Start pulling pub from its own repo.

Pub now lives in third_party/pkg/pub (it's in pkg to make it possible to import
using "package:" imports).

R=ricow@google.com, rnystrom@google.com

Review URL: https://codereview.chromium.org//1165473002

DEPS

@@ -82,6 +82,7 @@ vars = {
   "ply_rev": "@604b32590ffad5cbb82e4afef1d305512d06ae93",
   "plugin_tag": "@0.1.0",
   "pool_rev": "@22e12aeb16ad0b626900dbe79e4a25391ddfb28c",
+  "pub_rev": "@6f2a1b90b8210a85a38aab1af479c047681c29e6",
   "pub_semver_tag": "@1.2.1",
   "scheduled_test_tag": "@0.11.8+1",
   "shelf_rev": "@1e87b79b21ac5e6fa2f93576d6c06eaa65285ef4",
@@ -238,6 +239,8 @@ deps = {
       (Var("github_mirror") % "pool") + Var("pool_rev"),
   Var("dart_root") + "/third_party/pkg/pub_semver":
       (Var("github_mirror") % "pub_semver") + Var("pub_semver_tag"),
+  Var("dart_root") + "/third_party/pkg_tested/pub":
+      ("https://github.com/dart-lang/pub.git") + Var("pub_rev"),
   Var("dart_root") + "/third_party/pkg/scheduled_test":
       (Var("github_mirror") % "scheduled_test") +
       Var("scheduled_test_tag"),

pkg/pkg.gyp

@@ -30,6 +30,9 @@
             '--timestamp_file=<(SHARED_INTERMEDIATE_DIR)/packages.stamp',
             '<(PRODUCT_DIR)/packages',
             '<@(_inputs)',
+            # Pub imports dart2js as compiler_unsupported so it can work outside
+            # the SDK. Map that to the compiler package.
+            'compiler/lib:compiler_unsupported'
           ],
         },
       ],

sdk/bin/pub

@@ -53,5 +53,5 @@ DART="$BUILD_DIR/dart-sdk/bin/dart"
 PACKAGES_DIR="$BUILD_DIR/packages/"
 
 # Run pub.
-PUB="$SDK_DIR/lib/_internal/pub/bin/pub.dart"
+PUB="$SDK_DIR/../third_party/pkg_tested/pub/bin/pub.dart"
 exec "$DART" "${VM_OPTIONS[@]}" "--package-root=$PACKAGES_DIR" "$PUB" "$@"

sdk/bin/pub.bat

@@ -35,7 +35,7 @@ set PACKAGES_DIR=%BUILD_DIR%\packages
 set DART=%BUILD_DIR%\dart-sdk\bin\dart
 
 rem Run pub.
-set PUB="%SDK_DIR%\lib\_internal\pub\bin\pub.dart"
+set PUB="%SDK_DIR%\..\third_party\pkg_tested\pub\bin\pub.dart"
 "%DART%" %VM_OPTIONS% --package-root="%PACKAGES_DIR%" "%PUB%" %*
 
 endlocal