Add support for base::Closure in the MessageLoop.

content/gpu/gpu_watchdog_thread.h

 // Copyright (c) 2011 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_GPU_GPU_WATCHDOG_THREAD_H_
 #define CONTENT_GPU_GPU_WATCHDOG_THREAD_H_
 
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop.h"
@@ skipping 25 matching lines @@
  private:
 
   // An object of this type intercepts the reception and completion of all tasks
   // on the watched thread and checks whether the watchdog is armed.
   class GpuWatchdogTaskObserver : public MessageLoop::TaskObserver {
    public:
     explicit GpuWatchdogTaskObserver(GpuWatchdogThread* watchdog);
     virtual ~GpuWatchdogTaskObserver();
 
     // Implements MessageLoop::TaskObserver.
-    virtual void WillProcessTask(const Task* task);
-    virtual void DidProcessTask(const Task* task);
+    virtual void WillProcessTask(base::TimeTicks time_posted) OVERRIDE;
+    virtual void DidProcessTask(base::TimeTicks time_posted) OVERRIDE;
 
    private:
     GpuWatchdogThread* watchdog_;
   };
 
   void OnAcknowledge();
   void OnCheck();
   void DeliberatelyCrashingToRecoverFromHang();
   void Disable();
 
@@ skipping 11 matching lines @@
 
   base::Time arm_absolute_time_;
 
   typedef ScopedRunnableMethodFactory<GpuWatchdogThread> MethodFactory;
   scoped_ptr<MethodFactory> method_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(GpuWatchdogThread);
 };
 
 #endif  // CONTENT_GPU_GPU_WATCHDOG_THREAD_H_