gpu: Introduce GpuInit.

gpu/ipc/service/gpu_watchdog_thread.cc

 // 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.
 
 #include "gpu/ipc/service/gpu_watchdog_thread.h"
 
 #include <errno.h>
 #include <stdint.h>
 
 #include "base/bind.h"
@@ skipping 134 matching lines @@
   if (power_monitor)
     power_monitor->RemoveObserver(this);
 
 #if defined(USE_X11)
   if (tty_file_)
     fclose(tty_file_);
   XDestroyWindow(display_, window_);
   XCloseDisplay(display_);
 #endif
 
-  watched_message_loop_->RemoveTaskObserver(&task_observer_);
+  if (base::MessageLoop::current())
+    watched_message_loop_->RemoveTaskObserver(&task_observer_);
 }
 
 void GpuWatchdogThread::OnAcknowledge() {
   CHECK(base::PlatformThread::CurrentId() == GetThreadId());
 
   // The check has already been acknowledged and another has already been
   // scheduled by a previous call to OnAcknowledge. It is normal for a
   // watched thread to see armed_ being true multiple times before
   // the OnAcknowledge task is run on the watchdog thread.
   if (!armed_)
@@ skipping 309 matching lines @@
     int tty_number;
     size_t num_res = sscanf(tty_string, "tty%d\n", &tty_number);
     if (num_res == 1)
       return tty_number;
   }
   return -1;
 }
 #endif
 
 }  // namespace gpu