GPU Watchdog to check I/O before terminating GPU process

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 109 matching lines @@
   bool suspended_;
 
   // The time the last OnSuspend and OnResume was called.
   base::Time suspend_time_;
   base::Time resume_time_;
 
   // This is the time the last check was sent.
   base::Time check_time_;
   base::TimeTicks check_timeticks_;
 
+  // This specifies whether to use writing to a temp file as an additional step
+  // before crashing the process. That is used to allow the I/O queue to clear
+  // and give the watched thread more time to unblock in case it is blocked on
+  // a hard fault or other I/O.
+  bool use_temp_file_for_io_checking_;
+  base::TimeDelta io_check_duration_;
+
 #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_