Don't measure CPU time in timing out GPU watchdog.

content/gpu/gpu_watchdog_thread.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_GPU_GPU_WATCHDOG_THREAD_H_
 #define CONTENT_GPU_GPU_WATCHDOG_THREAD_H_
 
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
@@ skipping 70 matching lines @@
   void SetupXChangeProp();
   bool MatchXEventAtom(XEvent* event);
 #endif
 
   void OnAddPowerObserver();
 
   // Implement PowerObserver.
   void OnSuspend() override;
   void OnResume() override;
 
-#if defined(OS_WIN)
-  base::TimeDelta GetWatchedThreadTime();
-#endif
-
   base::MessageLoop* watched_message_loop_;
   base::TimeDelta timeout_;
   volatile bool armed_;
   GpuWatchdogTaskObserver task_observer_;
 
-#if defined(OS_WIN)
-  void* watched_thread_handle_;
-  base::TimeDelta arm_cpu_time_;
-#endif
-
   // Time after which it's assumed that the computer has been suspended since
   // the task was posted.
   base::Time suspension_timeout_;
 
   bool suspended_;
 
 #if defined(OS_CHROMEOS)
   FILE* tty_file_;
 #endif
 
 #if defined(USE_X11)
   XDisplay* display_;
   gfx::AcceleratedWidget window_;
   XAtom atom_;
 #endif
 
   base::WeakPtrFactory<GpuWatchdogThread> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(GpuWatchdogThread);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_GPU_GPU_WATCHDOG_THREAD_H_