Wrap filename with protocol

This makes it easy to browser the files in devtools, see electron/electron#811.

lib/module.js

@@ -27,6 +27,12 @@ var assert = require('assert').ok;
 var fs = NativeModule.require('fs');
 
 
+function wrapFilename(filename) {
+  if (!global.window || !global.window.location) return filename;
+  return global.window.location.origin + filename;
+}
+
+
 // If obj.hasOwnProperty has been overridden, then calling
 // obj.hasOwnProperty(prop) will break.
 // See: https://github.com/joyent/node/issues/1707
@@ -431,7 +437,7 @@ Module.prototype._compile = function(content, filename) {
       sandbox.global = sandbox;
       sandbox.root = root;
 
-      return runInNewContext(content, sandbox, { filename: filename });
+      return runInNewContext(content, sandbox, { filename: wrapFilename(filename) });
     }
 
     debug('load root module');
@@ -442,13 +448,13 @@ Module.prototype._compile = function(content, filename) {
     global.__dirname = dirname;
     global.module = self;
 
-    return runInThisContext(content, { filename: filename });
+    return runInThisContext(content, { filename: wrapFilename(filename) });
   }
 
   // create wrapper function
   var wrapper = Module.wrap(content);
 
-  var compiledWrapper = runInThisContext(wrapper, { filename: filename });
+  var compiledWrapper = runInThisContext(wrapper, { filename: wrapFilename(filename) });
   if (global.v8debug) {
     if (!resolvedArgv) {
       // we enter the repl if we're not given a filename argument.