diff --git a/dwds/debug_extension/pubspec.yaml b/dwds/debug_extension/pubspec.yaml
new file mode 100644
index 000000000..9cee88866
--- /dev/null
+++ b/dwds/debug_extension/pubspec.yaml
@@ -0,0 +1,19 @@
+name: extension
+publish_to: none
+version: 1.0.0
+author: Dart Team <misc@dartlang.org>
+homepage: https://github.com/dart-lang/webdev
+description: >-
+  A chrome extension for Dart debugging.
+
+environment:
+  sdk: ">=2.3.2-dev.0.1 <3.0.0"
+
+dependencies:
+  js: ^0.6.1+1
+  sse: ^2.0.2
+
+dev_dependencies:
+  webdev: ^2.0.0
+  build_web_compilers: ">=1.2.0 <3.0.0"
+  build_runner: ">=1.5.0 <2.0.0"
diff --git a/dwds/debug_extension/web/background.dart b/dwds/debug_extension/web/background.dart
new file mode 100644
index 000000000..927b9e83c
--- /dev/null
+++ b/dwds/debug_extension/web/background.dart
@@ -0,0 +1,112 @@
+// Copyright (c) 2019, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+@JS('chrome')
+library background;
+
+import 'package:js/js.dart';
+import 'package:sse/client/sse_client.dart';
+
+// GENERATE:
+// pub run build_runner build web -o build -r
+void main() {
+  addListener(allowInterop((e) {
+    var query = QueryInfo(active: true, currentWindow: true);
+    Tab currentTab;
+
+    // Sends commands to debugger attached to the current tab.
+    //
+    // Extracts the extension backend port from the injected JS.
+    var callback = allowInterop((List<Tab> tabs) {
+      currentTab = tabs[0];
+      attach(Debuggee(tabId: currentTab.id), '1.3', allowInterop(() {}));
+      sendCommand(Debuggee(tabId: currentTab.id), 'Debugger.enable',
+          CommandParams(), allowInterop((e) {}));
+      sendCommand(Debuggee(tabId: currentTab.id), 'Runtime.evaluate',
+          CommandParams(expression: '\$extensionPort'),
+          allowInterop((RemoteObject e) {
+        var port = e.result.value;
+        startSseClient(port);
+      }));
+    });
+
+    queryTabs(query, allowInterop((List tabs) {
+      callback(List.from(tabs));
+    }));
+  }));
+}
+
+// Starts an SSE client.
+//
+// Creates 2 channels which connect to the SSE handler at the extension
+// backend, send a simple message.
+Future<void> startSseClient(port) async {
+  var channel = SseClient('http://localhost:$port/test');
+  channel.stream.listen((s) {
+    channel.sink.add('This is channel 1.');
+  }, onError: (e) {
+    channel.close();
+  }, cancelOnError: true);
+
+  var channel2 = SseClient('http://localhost:$port/test');
+  await channel2.onOpen.first;
+  channel2.sink.add('This is channel 2.');
+}
+
+@JS('browserAction.onClicked.addListener')
+external void addListener(Function callback);
+
+@JS('debugger.sendCommand')
+external void sendCommand(Debuggee target, String method,
+    CommandParams commandParams, Function callback);
+
+@JS('debugger.attach')
+external void attach(
+    Debuggee target, String requiredVersion, Function callback);
+
+@JS('tabs.query')
+external void queryTabs(QueryInfo queryInfo, Function callback);
+
+@JS()
+@anonymous
+class QueryInfo {
+  external bool get active;
+  external bool get currentWindow;
+  external factory QueryInfo({bool active, bool currentWindow});
+}
+
+@JS()
+@anonymous
+class Debuggee {
+  external dynamic get tabId;
+  external String get extensionId;
+  external String get targetId;
+  external factory Debuggee(
+      {dynamic tabId, String extensionId, String targetId});
+}
+
+@JS()
+@anonymous
+class CommandParams {
+  external String get expression;
+  external factory CommandParams({String expression});
+}
+
+@JS()
+@anonymous
+class Tab {
+  external int get id;
+}
+
+@JS()
+@anonymous
+class RemoteObject {
+  external EvaluationResult get result;
+}
+
+@JS()
+@anonymous
+class EvaluationResult {
+  external dynamic get value;
+}
diff --git a/dwds/debug_extension/web/background.js b/dwds/debug_extension/web/background.js
new file mode 100644
index 000000000..286bc2180
--- /dev/null
+++ b/dwds/debug_extension/web/background.js
@@ -0,0 +1,6236 @@
+{}(function dartProgram(){function copyProperties(a,b){var u=Object.keys(a)
+for(var t=0;t<u.length;t++){var s=u[t]
+b[s]=a[s]}}var z=function(){var u=function(){}
+u.prototype={p:{}}
+var t=new u()
+if(!(t.__proto__&&t.__proto__.p===u.prototype.p))return false
+try{if(typeof navigator!="undefined"&&typeof navigator.userAgent=="string"&&navigator.userAgent.indexOf("Chrome/")>=0)return true
+if(typeof version=="function"&&version.length==0){var s=version()
+if(/^\d+\.\d+\.\d+\.\d+$/.test(s))return true}}catch(r){}return false}()
+function setFunctionNamesIfNecessary(a){function t(){};if(typeof t.name=="string")return
+for(var u=0;u<a.length;u++){var t=a[u]
+var s=Object.keys(t)
+for(var r=0;r<s.length;r++){var q=s[r]
+var p=t[q]
+if(typeof p=='function')p.name=q}}}function inherit(a,b){a.prototype.constructor=a
+a.prototype["$i"+a.name]=a
+if(b!=null){if(z){a.prototype.__proto__=b.prototype
+return}var u=Object.create(b.prototype)
+copyProperties(a.prototype,u)
+a.prototype=u}}function inheritMany(a,b){for(var u=0;u<b.length;u++)inherit(b[u],a)}function mixin(a,b){copyProperties(b.prototype,a.prototype)
+a.prototype.constructor=a}function lazy(a,b,c,d){var u=a
+a[b]=u
+a[c]=function(){a[c]=function(){H.mB(b)}
+var t
+var s=d
+try{if(a[b]===u){t=a[b]=s
+t=a[b]=d()}else t=a[b]}finally{if(t===s)a[b]=null
+a[c]=function(){return this[b]}}return t}}function makeConstList(a){a.immutable$list=Array
+a.fixed$length=Array
+return a}function convertToFastObject(a){function t(){}t.prototype=a
+new t()
+return a}function convertAllToFastObject(a){for(var u=0;u<a.length;++u)convertToFastObject(a[u])}var y=0
+function tearOffGetter(a,b,c,d,e){var u=null
+return e?function(f){if(u===null)u=H.i6(this,a,b,c,false,true,d)
+return new u(this,a[0],f,d)}:function(){if(u===null)u=H.i6(this,a,b,c,false,false,d)
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+return d?function(){if(u===null)u=H.i6(this,a,b,c,true,false,e).prototype
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+function installTearOff(a,b,c,d,e,f,g,h,i,j){var u=[]
+for(var t=0;t<h.length;t++){var s=h[t]
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+D:function(a,b){this.a.D(0,b)},
+gw:function(a){var u=this.a
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+gi:function(a){var u=this.a
+return u.gi(u)},
+h:function(a){return this.a.h(0)},
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+V:function(a,b){return H.iN(this,b,H.p(this,0))},
+$it:1}
+P.cc.prototype={}
+P.ci.prototype={}
+P.fj.prototype={
+j:function(a,b){var u,t=this.b
+if(t==null)return this.c.j(0,b)
+else if(typeof b!=="string")return
+else{u=t[b]
+return typeof u=="undefined"?this.dQ(b):u}},
+gi:function(a){var u
+if(this.b==null){u=this.c
+u=u.gi(u)}else u=this.aP().length
+return u},
+gw:function(a){return this.gi(this)===0},
+gai:function(){if(this.b==null)return this.c.gai()
+return new P.fk(this)},
+D:function(a,b){var u,t,s,r,q=this
+if(q.b==null)return q.c.D(0,b)
+u=q.aP()
+for(t=0;t<u.length;++t){s=u[t]
+r=q.b[s]
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+q.b[s]=r}b.$2(s,r)
+if(u!==q.c)throw H.a(P.N(q))}},
+aP:function(){var u=this.c
+if(u==null)u=this.c=H.e(Object.keys(this.a),[P.d])
+return u},
+dQ:function(a){var u
+if(!Object.prototype.hasOwnProperty.call(this.a,a))return
+u=P.fU(this.a[a])
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+gi:function(a){var u=this.a
+return u.gi(u)},
+R:function(a,b){var u=this.a
+return u.b==null?u.gai().R(0,b):u.aP()[b]},
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+if(u.b==null){u=u.gai()
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+gaf:function(a){return"us-ascii"},
+bF:function(a){return C.p.U(a)},
+gab:function(){return C.p}}
+P.fH.prototype={
+U:function(a){var u,t,s,r=P.W(0,null,a.length)-0,q=new Uint8Array(r)
+for(u=~this.a,t=0;t<r;++t){s=C.a.l(a,t)
+if((s&u)!==0)throw H.a(P.aS(a,"string","Contains invalid characters."))
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+P.cs.prototype={
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+u=$.k_()
+for(t=b,s=t,r=null,q=-1,p=-1,o=0;t<a0;t=n){n=t+1
+m=C.a.l(a,t)
+if(m===37){l=n+2
+if(l<=a0){k=H.he(C.a.l(a,n))
+j=H.he(C.a.l(a,n+1))
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+if(h>=0){i=C.a.n("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/",h)
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+m=i}else{if(h===-1){if(q<0){g=r==null?null:r.a.length
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+r.a+=C.a.k(a,s,t)
+r.a+=H.w(m)
+s=n
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+f=g.length
+if(q>=0)P.iq(a,p,a0,q,o,f)
+else{e=C.c.aN(f-1,4)+1
+if(e===1)throw H.a(P.m(c,a,a0))
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+r.a=g;++e}}g=r.a
+return C.a.ak(a,b,a0,g.charCodeAt(0)==0?g:g)}d=a0-b
+if(q>=0)P.iq(a,p,a0,q,o,d)
+else{e=C.c.aN(d,4)
+if(e===1)throw H.a(P.m(c,a,a0))
+if(e>1)a=C.a.ak(a,a0,a0,e===2?"==":"=")}return a}}
+P.ct.prototype={
+U:function(a){var u=a.length
+if(u===0)return""
+return P.am(new P.eT("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/").ep(a,0,u,!0),0,null)}}
+P.eT.prototype={
+ep:function(a,b,c,d){var u,t=this,s=(t.a&3)+(c-b),r=C.c.cr(s,3),q=r*4
+if(s-r*3>0)q+=4
+u=new Uint8Array(q)
+t.a=P.lu(t.b,a,b,c,!0,u,0,t.a)
+if(q>0)return u
+return}}
+P.cD.prototype={}
+P.cE.prototype={}
+P.c5.prototype={
+H:function(a,b){var u,t,s=this,r=s.b,q=s.c,p=J.J(b)
+if(p.gi(b)>r.length-q){r=s.b
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+u|=C.c.S(u,1)
+u|=u>>>2
+u|=u>>>4
+u|=u>>>8
+t=new Uint8Array((((u|u>>>16)>>>0)+1)*2)
+r=s.b
+C.k.a7(t,0,r.length,r)
+s.b=t}r=s.b
+q=s.c
+C.k.a7(r,q,q+p.gi(b),b)
+s.c=s.c+p.gi(b)},
+Y:function(a){this.a.$1(C.k.a8(this.b,0,this.c))}}
+P.cO.prototype={}
+P.cP.prototype={
+bF:function(a){return this.gab().U(a)}}
+P.cX.prototype={}
+P.by.prototype={}
+P.bH.prototype={
+h:function(a){var u=P.ay(this.a)
+return(this.b!=null?"Converting object to an encodable object failed:":"Converting object did not return an encodable object:")+" "+u}}
+P.dp.prototype={
+h:function(a){return"Cyclic error in JSON stringify"}}
+P.dn.prototype={
+em:function(a,b){var u=P.jh(a,this.gen().a)
+return u},
+eo:function(a,b){var u=P.lv(a,this.gab().b,null)
+return u},
+gab:function(){return C.W},
+gen:function(){return C.V}}
+P.dr.prototype={
+U:function(a){var u,t=new P.o(""),s=new P.ca(t,[],P.ju())
+s.aK(a)
+u=t.a
+return u.charCodeAt(0)==0?u:u}}
+P.dq.prototype={
+U:function(a){return P.jh(a,this.a)}}
+P.fl.prototype={
+d_:function(a){var u,t,s,r,q,p,o=a.length
+for(u=J.K(a),t=this.c,s=0,r=0;r<o;++r){q=u.l(a,r)
+if(q>92)continue
+if(q<32){if(r>s)t.a+=C.a.k(a,s,r)
+s=r+1
+t.a+=H.w(92)
+switch(q){case 8:t.a+=H.w(98)
+break
+case 9:t.a+=H.w(116)
+break
+case 10:t.a+=H.w(110)
+break
+case 12:t.a+=H.w(102)
+break
+case 13:t.a+=H.w(114)
+break
+default:t.a+=H.w(117)
+t.a+=H.w(48)
+t.a+=H.w(48)
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+t.a+=H.w(p<10?48+p:87+p)
+p=q&15
+t.a+=H.w(p<10?48+p:87+p)
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+s=r+1
+t.a+=H.w(92)
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+for(u=this.a,t=u.length,s=0;s<t;++s){r=u[s]
+if(a==null?r==null:a===r)throw H.a(new P.dp(a,null))}u.push(a)},
+aK:function(a){var u,t,s,r,q=this
+if(q.cZ(a))return
+q.bf(a)
+try{u=q.b.$1(a)
+if(!q.cZ(u)){s=P.iB(a,null,q.gco())
+throw H.a(s)}q.a.pop()}catch(r){t=H.A(r)
+s=P.iB(a,t,q.gco())
+throw H.a(s)}},
+cZ:function(a){var u,t,s=this
+if(typeof a==="number"){if(!isFinite(a))return!1
+s.c.a+=C.i.h(a)
+return!0}else if(a===!0){s.c.a+="true"
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+u.a+='"'
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+if(!!u.$iu){s.bf(a)
+s.f2(a)
+s.a.pop()
+return!0}else if(!!u.$iV){s.bf(a)
+t=s.f3(a)
+s.a.pop()
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+f2:function(a){var u,t,s=this.c
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+u=J.J(a)
+if(u.gaq(a)){this.aK(u.j(a,0))
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+t=new Array(u)
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+p.d_(t[s])
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+p.aK(t[s+1])}r.a+="}"
+return!0}}
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+$2:function(a,b){var u,t,s,r
+if(typeof a!=="string")this.a.b=!1
+u=this.b
+t=this.a
+s=t.a
+r=t.a=s+1
+u[s]=a
+t.a=r+1
+u[r]=b},
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+P.ca.prototype={
+gco:function(){var u=this.c.a
+return u.charCodeAt(0)==0?u:u}}
+P.ds.prototype={
+gaf:function(a){return"iso-8859-1"},
+bF:function(a){return C.y.U(a)},
+gab:function(){return C.y}}
+P.dt.prototype={}
+P.eD.prototype={
+gaf:function(a){return"utf-8"},
+gab:function(){return C.Q}}
+P.eF.prototype={
+U:function(a){var u,t,s=P.W(0,null,a.length),r=s-0
+if(r===0)return new Uint8Array(0)
+u=new Uint8Array(r*3)
+t=new P.fM(u)
+if(t.dz(a,0,s)!==s)t.cv(C.a.n(a,s-1),0)
+return C.k.a8(u,0,t.b)}}
+P.fM.prototype={
+cv:function(a,b){var u,t=this,s=t.c,r=t.b,q=r+1
+if((b&64512)===56320){u=65536+((a&1023)<<10)|b&1023
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+s[q]=128|a>>>6&63
+t.b=r+1
+s[r]=128|a&63
+return!1}},
+dz:function(a,b,c){var u,t,s,r,q,p,o,n=this
+if(b!==c&&(C.a.n(a,c-1)&64512)===55296)--c
+for(u=n.c,t=u.length,s=b;s<c;++s){r=C.a.l(a,s)
+if(r<=127){q=n.b
+if(q>=t)break
+n.b=q+1
+u[q]=r}else if((r&64512)===55296){if(n.b+3>=t)break
+p=s+1
+if(n.cv(r,C.a.l(a,p)))s=p}else if(r<=2047){q=n.b
+o=q+1
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+n.b=o
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+u[o]=128|r&63}else{q=n.b
+if(q+2>=t)break
+o=n.b=q+1
+u[q]=224|r>>>12
+q=n.b=o+1
+u[o]=128|r>>>6&63
+n.b=q+1
+u[q]=128|r&63}}return s}}
+P.eE.prototype={
+U:function(a){var u,t,s,r,q,p,o,n,m=P.lj(!1,a,0,null)
+if(m!=null)return m
+u=P.W(0,null,J.L(a))
+t=P.jn(a,0,u)
+if(t>0){s=P.am(a,0,t)
+if(t===u)return s
+r=new P.o(s)
+q=t
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+o.c=p
+o.el(a,q,u)
+if(o.e>0){H.k(P.m("Unfinished UTF-8 octet sequence",a,u))
+r.a+=H.w(65533)
+o.f=o.e=o.d=0}n=r.a
+return n.charCodeAt(0)==0?n:n}}
+P.fL.prototype={
+el:function(a,b,c){var u,t,s,r,q,p,o,n,m,l=this,k="Bad UTF-8 encoding 0x",j=l.d,i=l.e,h=l.f
+l.f=l.e=l.d=0
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+r=u.j(a,s)
+if((r&192)!==128){q=P.m(k+C.c.al(r,16),a,s)
+throw H.a(q)}else{j=(j<<6|r&63)>>>0;--i;++s}}while(i>0)
+if(j<=C.Z[h-1]){q=P.m("Overlong encoding of 0x"+C.c.al(j,16),a,s-h-1)
+throw H.a(q)}if(j>1114111){q=P.m("Character outside valid Unicode range: 0x"+C.c.al(j,16),a,s-h-1)
+throw H.a(q)}if(!l.c||j!==65279)t.a+=H.w(j)
+l.c=!1}for(q=s<c;q;){p=P.jn(a,s,c)
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+o=s+p
+t.a+=P.am(a,s,o)
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+n=o+1
+r=u.j(a,o)
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+throw H.a(m)}else{if((r&224)===192){j=r&31
+i=1
+h=1
+continue $label0$0}if((r&240)===224){j=r&15
+i=2
+h=2
+continue $label0$0}if((r&248)===240&&r<245){j=r&7
+i=3
+h=3
+continue $label0$0}m=P.m(k+C.c.al(r,16),a,n-1)
+throw H.a(m)}}break $label0$0}if(i>0){l.d=j
+l.e=i
+l.f=h}}}
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+t.a+=s.a
+u=t.a+=H.b(a.a)
+t.a=u+": "
+t.a+=P.ay(b)
+s.a=", "}}
+P.M.prototype={}
+P.bv.prototype={
+E:function(a,b){if(b==null)return!1
+return b instanceof P.bv&&this.a===b.a&&this.b===b.b},
+gq:function(a){var u=this.a
+return(u^C.c.S(u,30))&1073741823},
+h:function(a){var u=this,t=P.kF(H.l6(u)),s=P.bw(H.l4(u)),r=P.bw(H.l0(u)),q=P.bw(H.l1(u)),p=P.bw(H.l3(u)),o=P.bw(H.l5(u)),n=P.kG(H.l2(u))
+if(u.b)return t+"-"+s+"-"+r+" "+q+":"+p+":"+o+"."+n+"Z"
+else return t+"-"+s+"-"+r+" "+q+":"+p+":"+o+"."+n}}
+P.at.prototype={}
+P.ad.prototype={}
+P.aD.prototype={
+h:function(a){return"Throw of null."}}
+P.T.prototype={
+gbm:function(){return"Invalid argument"+(!this.a?"(s)":"")},
+gbl:function(){return""},
+h:function(a){var u,t,s,r,q=this,p=q.c,o=p!=null?" ("+p+")":""
+p=q.d
+u=p==null?"":": "+H.b(p)
+t=q.gbm()+o+u
+if(!q.a)return t
+s=q.gbl()
+r=P.ay(q.b)
+return t+s+": "+r}}
+P.aj.prototype={
+gbm:function(){return"RangeError"},
+gbl:function(){var u,t,s=this.e
+if(s==null){s=this.f
+u=s!=null?": Not less than or equal to "+H.b(s):""}else{t=this.f
+if(t==null)u=": Not greater than or equal to "+H.b(s)
+else if(t>s)u=": Not in range "+H.b(s)+".."+H.b(t)+", inclusive"
+else u=t<s?": Valid value range is empty":": Only valid value is "+H.b(s)}return u}}
+P.de.prototype={
+gbm:function(){return"RangeError"},
+gbl:function(){if(this.b<0)return": index must not be negative"
+var u=this.f
+if(u===0)return": no indices are valid"
+return": index should be less than "+u},
+gi:function(a){return this.f}}
+P.dQ.prototype={
+h:function(a){var u,t,s,r,q,p,o,n,m=this,l={},k=new P.o("")
+l.a=""
+for(u=m.c,t=u.length,s=0,r="",q="";s<t;++s,q=", "){p=u[s]
+k.a=r+q
+r=k.a+=P.ay(p)
+l.a=", "}m.d.D(0,new P.dR(l,k))
+o=P.ay(m.a)
+n=k.h(0)
+u="NoSuchMethodError: method not found: '"+H.b(m.b.a)+"'\nReceiver: "+o+"\nArguments: ["+n+"]"
+return u}}
+P.ev.prototype={
+h:function(a){return"Unsupported operation: "+this.a}}
+P.es.prototype={
+h:function(a){var u=this.a
+return u!=null?"UnimplementedError: "+u:"UnimplementedError"}}
+P.ak.prototype={
+h:function(a){return"Bad state: "+this.a}}
+P.cQ.prototype={
+h:function(a){var u=this.a
+if(u==null)return"Concurrent modification during iteration."
+return"Concurrent modification during iteration: "+P.ay(u)+"."}}
+P.dT.prototype={
+h:function(a){return"Out of Memory"},
+$iad:1}
+P.bU.prototype={
+h:function(a){return"Stack Overflow"},
+$iad:1}
+P.cY.prototype={
+h:function(a){var u=this.a
+return u==null?"Reading static variable during its initialization":"Reading static variable '"+u+"' during its initialization"}}
+P.f1.prototype={
+h:function(a){return"Exception: "+this.a}}
+P.aX.prototype={
+h:function(a){var u,t,s,r,q,p,o,n,m,l,k,j,i=this.a,h=""!==i?"FormatException: "+i:"FormatException",g=this.c,f=this.b
+if(typeof f==="string"){if(g!=null)i=g<0||g>f.length
+else i=!1
+if(i)g=null
+if(g==null){u=f.length>78?C.a.k(f,0,75)+"...":f
+return h+"\n"+u}for(t=1,s=0,r=!1,q=0;q<g;++q){p=C.a.l(f,q)
+if(p===10){if(s!==q||!r)++t
+s=q+1
+r=!1}else if(p===13){++t
+s=q+1
+r=!0}}h=t>1?h+(" (at line "+t+", character "+(g-s+1)+")\n"):h+(" (at character "+(g+1)+")\n")
+o=f.length
+for(q=g;q<o;++q){p=C.a.n(f,q)
+if(p===10||p===13){o=q
+break}}if(o-s>78)if(g-s<75){n=s+75
+m=s
+l=""
+k="..."}else{if(o-g<75){m=o-75
+n=o
+k=""}else{m=g-36
+n=g+36
+k="..."}l="..."}else{n=o
+m=s
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+if(a.a.j(0,k)!=null)H.jJ(a.a.j(0,k),"$iV",[P.a7,null],"$aV")
+o.b=[J.ke(J.a4(o.a,0),1),J.a4(o.a,1),J.a4(o.a,2),J.a4(o.a,3),J.a4(o.a,4),J.a4(o.a,5)]
+o.c=(J.kf(J.a4(o.a,6),8)|J.a4(o.a,7))&262143},
+f1:function(){var u,t,s,r,q,p,o,n,m,l,k,j=this,i="clockSeq",h="nSecs",g=4294967296,f=new Array(16)
+f.fixed$length=Array
+u=H.e(f,[P.h])
+t=new H.C([P.d,null])
+s=t.j(0,i)!=null?t.j(0,i):j.c
+r=t.j(0,"mSecs")!=null?t.j(0,"mSecs"):Date.now()
+q=t.j(0,h)!=null?t.j(0,h):j.e+1
+f=J.au(r)
+p=J.il(f.c4(r,j.d),J.kc(J.kg(q,j.e),1e4))
+o=J.au(p)
+if(o.c0(p,0)&&t.j(0,i)==null)s=J.kb(J.il(s,1),16383)
+if((o.c0(p,0)||f.b8(r,j.d))&&t.j(0,h)==null)q=0
+if(J.kd(q,1e4))throw H.a(P.iw("uuid.v1(): Can't create more than 10M uuids/sec"))
+j.d=r
+j.e=q
+j.c=s
+r=f.a2(r,122192928e5)
+f=J.i8(r)
+n=C.i.aN(f.aL(r,268435455)*1e4+q,g)
+u[0]=C.i.S(n,24)&255
+u[1]=C.i.S(n,16)&255
+u[2]=C.i.S(n,8)&255
+u[3]=n&255
+m=C.i.cH(f.bZ(r,g)*1e4)&268435455
+u[4]=m>>>8&255
+u[5]=m&255
+u[6]=m>>>24&15|16
+u[7]=m>>>16&255
+f=J.au(s)
+u[8]=(f.d5(s,8)|128)>>>0
+u[9]=f.aL(s,255)
+l=t.j(0,"node")!=null?t.j(0,"node"):j.b
+for(f=J.J(l),k=0;k<6;++k)u[10+k]=f.j(l,k)
+return H.b(j.r[u[0]])+H.b(j.r[u[1]])+H.b(j.r[u[2]])+H.b(j.r[u[3]])+"-"+H.b(j.r[u[4]])+H.b(j.r[u[5]])+"-"+H.b(j.r[u[6]])+H.b(j.r[u[7]])+"-"+H.b(j.r[u[8]])+H.b(j.r[u[9]])+"-"+H.b(j.r[u[10]])+H.b(j.r[u[11]])+H.b(j.r[u[12]])+H.b(j.r[u[13]])+H.b(j.r[u[14]])+H.b(j.r[u[15]])}}
+M.ho.prototype={
+$1:function(a){var u={},t={active:!0,currentWindow:!0}
+u.a=null
+u=P.bl(new M.hm(P.bl(new M.hn(u))))
+chrome.tabs.query(t,u)},
+$S:0}
+M.hn.prototype={
+$1:function(a){var u,t,s,r=J.a4(a,0),q=this.a
+q.a=r
+u={tabId:J.hw(r)}
+t=P.bl(new M.hj())
+chrome.debugger.attach(u,"1.3",t)
+t={tabId:J.hw(q.a)}
+u={}
+s=P.bl(new M.hk())
+chrome.debugger.sendCommand(t,"Debugger.enable",u,s)
+q={tabId:J.hw(q.a)}
+s={expression:"$extensionPort"}
+u=P.bl(new M.hl())
+chrome.debugger.sendCommand(q,"Runtime.evaluate",s,u)}}
+M.hj.prototype={
+$0:function(){},
+$C:"$0",
+$R:0}
+M.hk.prototype={
+$1:function(a){},
+$S:0}
+M.hl.prototype={
+$1:function(a){M.hr(J.kp(J.kn(a)))}}
+M.hm.prototype={
+$1:function(a){this.a.$1(P.bI(a,!0,M.bW))}}
+M.hs.prototype={
+$1:function(a){this.a.b.H(0,"This is channel 1.")}}
+M.ht.prototype={
+$1:function(a){this.a.Y(0)},
+$S:0}
+M.hQ.prototype={}
+M.hz.prototype={}
+M.hy.prototype={}
+M.bW.prototype={}
+M.e0.prototype={}
+M.hA.prototype={};(function aliases(){var u=J.F.prototype
+u.d8=u.h
+u.d7=u.b1
+u=J.bG.prototype
+u.d9=u.h
+u=H.C.prototype
+u.da=u.cL
+u.dc=u.cM
+u.dd=u.cN
+u=P.G.prototype
+u.de=u.am
+u=G.br.prototype
+u.d6=u.es
+u=Y.b6.prototype
+u.df=u.E})();(function installTearOffs(){var u=hunkHelpers._static_1,t=hunkHelpers._static_0,s=hunkHelpers.installStaticTearOff,r=hunkHelpers.installInstanceTearOff,q=hunkHelpers._static_2,p=hunkHelpers._instance_1i,o=hunkHelpers._instance_0i,n=hunkHelpers._instance_2i,m=hunkHelpers._instance_1u,l=hunkHelpers._instance_0u
+u(H,"jf","lY",9)
+u(P,"m1","lr",6)
+u(P,"m2","ls",6)
+u(P,"m3","lt",6)
+t(P,"js","lX",4)
+s(P,"m5",1,null,["$2","$1"],["jg",function(a){return P.jg(a,null)}],2,0)
+t(P,"m4","lU",4)
+r(P.c6.prototype,"gcC",0,1,function(){return[null]},["$2","$1"],["aa","cD"],2,0)
+r(P.ch.prototype,"gej",0,0,null,["$1","$0"],["Z","ek"],11,0)
+r(P.r.prototype,"gcc",0,1,function(){return[null]},["$2","$1"],["W","ds"],2,0)
+r(P.cf.prototype,"ge9",0,1,null,["$2","$1"],["cw","ea"],2,0)
+q(P,"m6","lN",19)
+u(P,"m7","lO",20)
+u(P,"ju","lP",5)
+var k
+p(k=P.c5.prototype,"ge8","H",14)
+o(k,"geh","Y",4)
+u(P,"mc","mn",21)
+q(P,"mb","mm",22)
+u(P,"ma","li",9)
+n(W.ae.prototype,"gd2","d3",16)
+m(k=M.bT.prototype,"gdI","dJ",8)
+m(k,"gdK","dL",8)
+l(k,"gdM","dN",4)
+m(k,"gdO","aS",1)})();(function inheritance(){var u=hunkHelpers.mixin,t=hunkHelpers.inherit,s=hunkHelpers.inheritMany
+t(P.f,null)
+s(P.f,[H.hJ,J.F,J.aT,P.cc,P.Y,H.O,P.dh,H.d0,H.bB,H.eu,H.b9,P.dG,H.cR,H.dj,H.ax,H.eq,P.ad,H.aW,H.ce,H.bX,P.bJ,H.du,H.dw,H.bF,H.cd,H.c1,H.bV,H.fE,P.fF,P.eL,P.c6,P.c9,P.r,P.c2,P.al,P.ec,P.ed,P.cf,P.eS,P.c4,P.fs,P.eZ,P.eY,P.fC,P.aw,P.fN,P.fy,P.fq,P.cb,P.G,P.fI,P.cP,P.eT,P.cO,P.fl,P.fM,P.fL,P.M,P.bv,P.bm,P.dT,P.bU,P.f1,P.aX,P.u,P.q,P.aA,P.e_,P.I,P.d,P.o,P.a7,P.ao,P.ex,P.Q,P.eI,P.fi,P.a1,M.E,B.bP,E.cu,G.br,T.cx,E.bt,R.dH,N.b_,N.aZ,N.dB,M.cT,O.en,X.dU,X.dW,Y.e5,D.e6,Y.b6,U.d4,V.aG,V.bS,G.e8,R.eb,X.el,F.eG])
+s(J.F,[J.bD,J.dk,J.bG,J.a5,J.af,J.ag,H.dL,H.b2,W.aV,W.cZ,W.c])
+s(J.bG,[J.dX,J.a8,J.a6,M.hQ,M.hz,M.hy,M.bW,M.e0,M.hA])
+t(J.hI,J.a5)
+s(J.af,[J.bE,J.di])
+t(P.dA,P.cc)
+t(H.bY,P.dA)
+t(H.X,H.bY)
+s(P.Y,[H.t,H.c_,H.b5,P.dg,H.fD])
+s(H.t,[H.az,H.d_,H.dv])
+s(H.az,[H.eo,H.bK,P.fk])
+s(P.dh,[H.c0,H.e4])
+t(H.bx,H.b5)
+t(P.ci,P.dG)
+t(P.bZ,P.ci)
+t(H.cS,P.bZ)
+t(H.bu,H.cR)
+s(H.ax,[H.dZ,H.hu,H.ep,H.dl,H.hf,H.hg,H.hh,P.eP,P.eO,P.eQ,P.eR,P.fG,P.eN,P.eM,P.fR,P.fS,P.h5,P.f3,P.fb,P.f7,P.f8,P.f9,P.f5,P.fa,P.f4,P.fe,P.ff,P.fd,P.fc,P.ef,P.ei,P.ej,P.eg,P.eh,P.fA,P.fz,P.eV,P.eU,P.ft,P.fT,P.h1,P.fw,P.fv,P.fx,P.fo,P.dz,P.dF,P.fm,P.h2,P.dR,P.ey,P.eA,P.eB,P.fJ,P.fK,P.fW,P.fV,P.fX,P.fY,W.f0,P.eJ,P.h7,P.h8,P.h9,M.cG,M.cH,M.cI,M.h_,G.cv,G.cw,O.cB,O.cz,O.cA,O.cC,Z.cF,U.e2,Z.cK,Z.cL,R.dI,R.dK,R.dJ,N.hb,N.dD,M.cV,M.cU,M.cW,M.h3,X.dV,U.d5,U.d6,U.d7,U.d8,U.d9,U.da,U.db,U.dc,U.dd,M.ho,M.hn,M.hj,M.hk,M.hl,M.hm,M.hs,M.ht])
+s(P.ad,[H.dS,H.dm,H.et,H.cM,H.e3,P.bH,P.aD,P.T,P.dQ,P.ev,P.es,P.ak,P.cQ,P.cY])
+s(H.ep,[H.ea,H.aU])
+t(P.dE,P.bJ)
+s(P.dE,[H.C,P.fj])
+t(H.eK,P.dg)
+t(H.bL,H.b2)
+s(H.bL,[H.bd,H.bf])
+t(H.be,H.bd)
+t(H.b0,H.be)
+t(H.bg,H.bf)
+t(H.b1,H.bg)
+s(H.b1,[H.dM,H.dN,H.dO,H.dP,H.bM,H.bN,H.aC])
+s(P.c6,[P.bb,P.ch])
+s(P.al,[P.ee,P.fB,W.an])
+t(P.c3,P.cf)
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+t(P.eW,P.c4)
+s(P.fs,[P.fh,P.cg])
+s(P.eZ,[P.c7,P.c8])
+t(P.fu,P.fN)
+s(H.C,[P.fr,P.fn])
+t(P.fp,P.fy)
+s(P.cP,[P.by,P.cs,P.dn,N.d2])
+s(P.by,[P.cq,P.ds,P.eD])
+t(P.cX,P.ed)
+s(P.cX,[P.fH,P.ct,P.dr,P.dq,P.eF,P.eE,R.d3])
+s(P.fH,[P.cr,P.dt])
+t(P.cD,P.cO)
+t(P.cE,P.cD)
+t(P.c5,P.cE)
+t(P.dp,P.bH)
+t(P.ca,P.fl)
+s(P.bm,[P.at,P.h])
+s(P.T,[P.aj,P.de])
+t(P.eX,P.ao)
+s(W.aV,[W.bO,W.bz,W.bA,W.bC])
+t(W.ac,W.bO)
+t(W.ae,W.bC)
+s(W.c,[W.aB,W.ai])
+t(W.f_,P.ec)
+t(P.ba,P.eI)
+t(O.cy,E.cu)
+t(Z.bs,P.ee)
+t(O.e1,G.br)
+s(T.cx,[U.b4,X.b8])
+t(Z.cJ,M.E)
+t(B.df,O.en)
+s(B.df,[E.dY,F.eC,L.eH])
+t(Y.d1,D.e6)
+s(Y.b6,[Y.f2,V.e7])
+t(G.aH,G.e8)
+t(X.b7,V.e7)
+t(M.bT,R.eb)
+t(E.em,G.aH)
+u(H.bY,H.eu)
+u(H.bd,P.G)
+u(H.be,H.bB)
+u(H.bf,P.G)
+u(H.bg,H.bB)
+u(P.c3,P.eS)
+u(P.cc,P.G)
+u(P.ci,P.fI)})()
+var v={mangledGlobalNames:{h:"int",at:"double",bm:"num",d:"String",M:"bool",q:"Null",u:"List"},mangledNames:{},getTypeFromName:getGlobalFromName,metadata:[],types:[{func:1,ret:P.q,args:[,]},{func:1,ret:-1,args:[,]},{func:1,ret:-1,args:[P.f],opt:[P.I]},{func:1,ret:P.q,args:[,,]},{func:1,ret:-1},{func:1,args:[,]},{func:1,ret:-1,args:[{func:1,ret:-1}]},{func:1,ret:P.M,args:[,]},{func:1,ret:-1,args:[W.c]},{func:1,ret:P.d,args:[P.d]},{func:1,ret:P.q,args:[,P.I]},{func:1,ret:-1,opt:[P.f]},{func:1,ret:P.q,args:[,],opt:[P.I]},{func:1,ret:[P.r,,],args:[,]},{func:1,ret:-1,args:[P.f]},{func:1,ret:P.a1,args:[,,]},{func:1,ret:-1,args:[P.d,P.d]},{func:1,args:[,,]},{func:1,ret:P.M,args:[P.f]},{func:1,ret:P.M,args:[,,]},{func:1,ret:P.h,args:[,]},{func:1,ret:P.h,args:[P.f]},{func:1,ret:P.M,args:[P.f,P.f]}],interceptorsByTag:null,leafTags:null};(function constants(){var u=hunkHelpers.makeConstList
+C.w=W.bz.prototype
+C.S=W.bA.prototype
+C.x=W.ae.prototype
+C.T=J.F.prototype
+C.b=J.a5.prototype
+C.c=J.bE.prototype
+C.i=J.af.prototype
+C.a=J.ag.prototype
+C.U=J.a6.prototype
+C.n=H.bM.prototype
+C.k=H.aC.prototype
+C.E=J.dX.prototype
+C.o=J.a8.prototype
+C.p=new P.cr(127)
+C.e=new P.cq()
+C.G=new P.ct()
+C.F=new P.cs()
+C.q=new H.d0()
+C.H=new N.d2()
+C.I=new R.d3()
+C.r=function getTagFallback(o) {
+  var s = Object.prototype.toString.call(o);
+  return s.substring(8, s.length - 1);
+}
+C.J=function() {
+  var toStringFunction = Object.prototype.toString;
+  function getTag(o) {
+    var s = toStringFunction.call(o);
+    return s.substring(8, s.length - 1);
+  }
+  function getUnknownTag(object, tag) {
+    if (/^HTML[A-Z].*Element$/.test(tag)) {
+      var name = toStringFunction.call(object);
+      if (name == "[object Object]") return null;
+      return "HTMLElement";
+    }
+  }
+  function getUnknownTagGenericBrowser(object, tag) {
+    if (self.HTMLElement && object instanceof HTMLElement) return "HTMLElement";
+    return getUnknownTag(object, tag);
+  }
+  function prototypeForTag(tag) {
+    if (typeof window == "undefined") return null;
+    if (typeof window[tag] == "undefined") return null;
+    var constructor = window[tag];
+    if (typeof constructor != "function") return null;
+    return constructor.prototype;
+  }
+  function discriminator(tag) { return null; }
+  var isBrowser = typeof navigator == "object";
+  return {
+    getTag: getTag,
+    getUnknownTag: isBrowser ? getUnknownTagGenericBrowser : getUnknownTag,
+    prototypeForTag: prototypeForTag,
+    discriminator: discriminator };
+}
+C.O=function(getTagFallback) {
+  return function(hooks) {
+    if (typeof navigator != "object") return hooks;
+    var ua = navigator.userAgent;
+    if (ua.indexOf("DumpRenderTree") >= 0) return hooks;
+    if (ua.indexOf("Chrome") >= 0) {
+      function confirm(p) {
+        return typeof window == "object" && window[p] && window[p].name == p;
+      }
+      if (confirm("Window") && confirm("HTMLElement")) return hooks;
+    }
+    hooks.getTag = getTagFallback;
+  };
+}
+C.K=function(hooks) {
+  if (typeof dartExperimentalFixupGetTag != "function") return hooks;
+  hooks.getTag = dartExperimentalFixupGetTag(hooks.getTag);
+}
+C.L=function(hooks) {
+  var getTag = hooks.getTag;
+  var prototypeForTag = hooks.prototypeForTag;
+  function getTagFixed(o) {
+    var tag = getTag(o);
+    if (tag == "Document") {
+      if (!!o.xmlVersion) return "!Document";
+      return "!HTMLDocument";
+    }
+    return tag;
+  }
+  function prototypeForTagFixed(tag) {
+    if (tag == "Document") return null;
+    return prototypeForTag(tag);
+  }
+  hooks.getTag = getTagFixed;
+  hooks.prototypeForTag = prototypeForTagFixed;
+}
+C.N=function(hooks) {
+  var userAgent = typeof navigator == "object" ? navigator.userAgent : "";
+  if (userAgent.indexOf("Firefox") == -1) return hooks;
+  var getTag = hooks.getTag;
+  var quickMap = {
+    "BeforeUnloadEvent": "Event",
+    "DataTransfer": "Clipboard",
+    "GeoGeolocation": "Geolocation",
+    "Location": "!Location",
+    "WorkerMessageEvent": "MessageEvent",
+    "XMLDocument": "!Document"};
+  function getTagFirefox(o) {
+    var tag = getTag(o);
+    return quickMap[tag] || tag;
+  }
+  hooks.getTag = getTagFirefox;
+}
+C.M=function(hooks) {
+  var userAgent = typeof navigator == "object" ? navigator.userAgent : "";
+  if (userAgent.indexOf("Trident/") == -1) return hooks;
+  var getTag = hooks.getTag;
+  var quickMap = {
+    "BeforeUnloadEvent": "Event",
+    "DataTransfer": "Clipboard",
+    "HTMLDDElement": "HTMLElement",
+    "HTMLDTElement": "HTMLElement",
+    "HTMLPhraseElement": "HTMLElement",
+    "Position": "Geoposition"
+  };
+  function getTagIE(o) {
+    var tag = getTag(o);
+    var newTag = quickMap[tag];
+    if (newTag) return newTag;
+    if (tag == "Object") {
+      if (window.DataView && (o instanceof window.DataView)) return "DataView";
+    }
+    return tag;
+  }
+  function prototypeForTagIE(tag) {
+    var constructor = window[tag];
+    if (constructor == null) return null;
+    return constructor.prototype;
+  }
+  hooks.getTag = getTagIE;
+  hooks.prototypeForTag = prototypeForTagIE;
+}
+C.t=function(hooks) { return hooks; }
+
+C.u=new P.dn()
+C.f=new P.ds()
+C.P=new P.dT()
+C.h=new P.eD()
+C.Q=new P.eF()
+C.v=new P.eY()
+C.R=new P.fi()
+C.d=new P.fu()
+C.V=new P.dq(null)
+C.W=new P.dr(null)
+C.y=new P.dt(255)
+C.X=new N.aZ("INFO",800)
+C.Y=new N.aZ("WARNING",900)
+C.Z=H.e(u([127,2047,65535,1114111]),[P.h])
+C.z=H.e(u([0,0,32776,33792,1,10240,0,0]),[P.h])
+C.j=H.e(u([0,0,65490,45055,65535,34815,65534,18431]),[P.h])
+C.A=H.e(u([0,0,26624,1023,65534,2047,65534,2047]),[P.h])
+C.l=H.e(u([]),[P.d])
+C.B=u([])
+C.a0=H.e(u([0,0,32722,12287,65534,34815,65534,18431]),[P.h])
+C.C=H.e(u([0,0,24576,1023,65534,34815,65534,18431]),[P.h])
+C.a1=H.e(u([0,0,32754,11263,65534,34815,65534,18431]),[P.h])
+C.D=H.e(u([0,0,65490,12287,65535,34815,65534,18431]),[P.h])
+C.a3=new H.bu(0,{},C.l,[P.d,P.d])
+C.a_=H.e(u([]),[P.a7])
+C.m=new H.bu(0,{},C.a_,[P.a7,null])
+C.a2=new H.b9("call")})();(function staticFields(){$.iu=null
+$.is=null
+$.jx=null
+$.jq=null
+$.jF=null
+$.ha=null
+$.hi=null
+$.ib=null
+$.aK=null
+$.bi=null
+$.bj=null
+$.i1=!1
+$.j=C.d
+$.ar=[]
+$.kH=P.dy(["iso_8859-1:1987",C.f,"iso-ir-100",C.f,"iso_8859-1",C.f,"iso-8859-1",C.f,"latin1",C.f,"l1",C.f,"ibm819",C.f,"cp819",C.f,"csisolatin1",C.f,"iso-ir-6",C.e,"ansi_x3.4-1968",C.e,"ansi_x3.4-1986",C.e,"iso_646.irv:1991",C.e,"iso646-us",C.e,"us-ascii",C.e,"us",C.e,"ibm367",C.e,"cp367",C.e,"csascii",C.e,"ascii",C.e,"csutf8",C.h,"utf-8",C.h],P.d,P.by)
+$.i5=[]
+$.kU=P.dx(P.d,N.b_)
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new file mode 100644
index 000000000..f37c49473
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diff --git a/dwds/debug_extension/web/manifest.json b/dwds/debug_extension/web/manifest.json
new file mode 100644
index 000000000..a76dd13f8
--- /dev/null
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+        ]
+    }
+}
\ No newline at end of file