Enable webgl conformance tests under content/test/gpu in content_browsertests

content/public/test/browser_test_utils.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_PUBLIC_TEST_BROWSER_TEST_UTILS_H_
 #define CONTENT_PUBLIC_TEST_BROWSER_TEST_UTILS_H_
 
+#include <queue>
 #include <string>
 #include <vector>
 
 #include "base/callback_forward.h"
 #include "base/compiler_specific.h"
 #include "base/memory/ref_counted.h"
 #include "base/process.h"
 #include "base/scoped_temp_dir.h"
 #include "base/string16.h"
 #include "content/public/browser/notification_observer.h"
@@ skipping 187 matching lines @@
 
   // Holds port number which the python websocket server uses.
   int port_;
 
   // If the python websocket server serves with TLS.
   bool secure_;
 
   DISALLOW_COPY_AND_ASSIGN(TestWebSocketServer);
 };
 
+// Watches for responses from the DOMAutomationController and keeps them in a
+// queue. Useful for waiting for a message to be received.
+class DOMMessageQueue : public content::NotificationObserver {

[jam, 2012/09/24 16:45:37]

nit: get rid of "content::" everywhere here since it's already in the content
namespace

+ public:
+  // Constructs a DOMMessageQueue and begins listening for messages from the
+  // DOMAutomationController. Do not construct this until the browser has
+  // started.
+  DOMMessageQueue();
+  virtual ~DOMMessageQueue();
+
+  // Removes all messages in the message queue.
+  void ClearQueue();
+
+  // Wait for the next message to arrive. |message| will be set to the next
+  // message, if not null. Returns true on success.
+  bool WaitForMessage(std::string* message) WARN_UNUSED_RESULT;
+
+  // Overridden content::NotificationObserver methods.
+  virtual void Observe(int type,
+                       const content::NotificationSource& source,
+                       const content::NotificationDetails& details) OVERRIDE;
+
+ private:
+  content::NotificationRegistrar registrar_;
+  std::queue<std::string> message_queue_;
+  bool waiting_for_message_;
+  scoped_refptr<content::MessageLoopRunner> message_loop_runner_;
+
+  DISALLOW_COPY_AND_ASSIGN(DOMMessageQueue);
+};
+
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_TEST_BROWSER_TEST_UTILS_H_