Aura: Allow browser UI thread waiting for compositor commits.

base/threading/thread_restrictions.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 BASE_THREADING_THREAD_RESTRICTIONS_H_
 #define BASE_THREADING_THREAD_RESTRICTIONS_H_
 
 #include "base/base_export.h"
 #include "base/basictypes.h"
 
@@ skipping 11 matching lines @@
 class MetricsService;
 class NativeBackendKWallet;
 class ScopedAllowWaitForLegacyWebViewApi;
 class TestingAutomationProvider;
 class TextInputClientMac;
 
 namespace browser_sync {
 class NonFrontendDataTypeController;
 class UIModelWorker;
 }
+namespace cc {
+class CCCompletionEvent;
+}
 namespace chromeos {
 class AudioMixerAlsa;
 class BlockingMethodCaller;
 namespace system {
 class StatisticsProviderImpl;
 }
 }
 namespace chrome_browser_net {
 class Predictor;
 }
@@ skipping 119 matching lines @@
   static void AssertWaitAllowed() {}
 #endif
 
  private:
   // DO NOT ADD ANY OTHER FRIEND STATEMENTS, talk to jam or brettw first.
   // BEGIN ALLOWED USAGE.
   friend class content::RenderWidgetHelper;
   friend class ::HistogramSynchronizer;
   friend class ::ScopedAllowWaitForLegacyWebViewApi;
   friend class ::TestingAutomationProvider;
+  friend class cc::CCCompletionEvent;
   friend class remoting::AutoThread;
   friend class SequencedWorkerPool;
   friend class SimpleThread;
   friend class Thread;
   friend class ThreadTestHelper;
 
   // END ALLOWED USAGE.
   // BEGIN USAGE THAT NEEDS TO BE FIXED.
   friend class ::chromeos::AudioMixerAlsa;        // http://crbug.com/125206
   friend class ::chromeos::BlockingMethodCaller;  // http://crbug.com/125360
@@ skipping 40 matching lines @@
 
     DISALLOW_COPY_AND_ASSIGN(ScopedAllowWait);
   };
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(ThreadRestrictions);
 };
 
 }  // namespace base
 
 #endif  // BASE_THREADING_THREAD_RESTRICTIONS_H_