Expose content shell's remote debugging URL.

lib/src/runner/browser/browser_manager.dart

 // Copyright (c) 2015, 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.
 
 library test.runner.browser.browser_manager;
 
 import 'dart:async';
 import 'dart:convert';
 
 import 'package:async/async.dart';
@@ skipping 133 matching lines @@
           webSocket.map(JSON.decode),
           mapSink(webSocket, JSON.encode)) {
     _environment = _loadBrowserEnvironment();
     _channel.stream.listen(_onMessage, onDone: close);
   }
 
   /// Loads [_BrowserEnvironment].
   Future<_BrowserEnvironment> _loadBrowserEnvironment() async {
     var observatoryUrl;
     if (_platform.isDartVM) observatoryUrl = await _browser.observatoryUrl;
-    return new _BrowserEnvironment(this, observatoryUrl);
+
+    var remoteDebuggerUrl;
+    if (_platform == TestPlatform.contentShell) {
+      remoteDebuggerUrl = await _browser.remoteDebuggerUrl;
+    }
+
+    return new _BrowserEnvironment(this, observatoryUrl, remoteDebuggerUrl);
   }
 
   /// Tells the browser the load a test suite from the URL [url].
   ///
   /// [url] should be an HTML page with a reference to the JS-compiled test
   /// suite. [path] is the path of the original test suite file, which is used
   /// for reporting. [metadata] is the parsed metadata for the test suite.
   ///
   /// If [mapper] is passed, it's used to map stack traces for errors coming
   /// from this test suite.
@@ skipping 113 matching lines @@
 }
 
 /// An implementation of [Environment] for the browser.
 ///
 /// All methods forward directly to [BrowserManager].
 class _BrowserEnvironment implements Environment {
   final BrowserManager _manager;
 
   final Uri observatoryUrl;
 
-  _BrowserEnvironment(this._manager, this.observatoryUrl);
+  final Uri remoteDebuggerUrl;
+
+  _BrowserEnvironment(this._manager, this.observatoryUrl,
+      this.remoteDebuggerUrl);
 
   CancelableFuture displayPause() => _manager._displayPause();
 }