gpu: Move GpuWatchdogThread into //gpu/ipc/service from content.

gpu/gpu_ipc_service.gypi

 # Copyright (c) 2016 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.
 
 {
   'dependencies': [
     '../base/base.gyp:base',
     '../ipc/ipc.gyp:ipc',
     '../ui/events/events.gyp:events_base',
     '../ui/events/events.gyp:events_ipc',
@@ skipping 15 matching lines @@
       'ipc/service/gpu_command_buffer_stub.cc',
       'ipc/service/gpu_command_buffer_stub.h',
       'ipc/service/gpu_config.h',
       'ipc/service/gpu_memory_buffer_factory.cc',
       'ipc/service/gpu_memory_buffer_factory.h',
       'ipc/service/gpu_memory_manager.cc',
       'ipc/service/gpu_memory_manager.h',
       'ipc/service/gpu_memory_tracking.cc',
       'ipc/service/gpu_memory_tracking.h',
       'ipc/service/gpu_watchdog.h',
+      'ipc/service/gpu_watchdog_thread.cc',
+      'ipc/service/gpu_watchdog_thread.h',
       'ipc/service/image_transport_surface.h',
       'ipc/service/pass_through_image_transport_surface.cc',
       'ipc/service/pass_through_image_transport_surface.h',
   ],
   'conditions': [
     ['OS=="win"', {
       'sources': [
         'ipc/service/child_window_surface_win.cc',
         'ipc/service/child_window_surface_win.h',
         'ipc/service/image_transport_surface_win.cc',
@@ skipping 43 matching lines @@
         'ipc/service/gpu_memory_buffer_factory_ozone_native_pixmap.cc',
         'ipc/service/gpu_memory_buffer_factory_ozone_native_pixmap.h',
       ],
       'dependencies': [
         '../ui/ozone/gl/ozone_gl.gyp:ozone_gl',
         '../ui/ozone/ozone.gyp:ozone',
       ],
     }],
   ],
 }