Infrastructure for temportarily relinquishing GPU resources.

ui/ozone/public/ozone_platform.cc

 // Copyright 2014 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 "base/command_line.h"
 #include "base/debug/trace_event.h"
 #include "base/logging.h"
 #include "ui/events/devices/device_data_manager.h"
 #include "ui/ozone/platform_object.h"
 #include "ui/ozone/platform_selection.h"
@@ skipping 14 matching lines @@
   instance_ = this;
   g_platform_initialized_ui = false;
   g_platform_initialized_gpu = false;
 }
 
 OzonePlatform::~OzonePlatform() {
   DCHECK_EQ(instance_, this);
   instance_ = NULL;
 }
 
+void OzonePlatform::RelinquishGpuResources(base::Closure callback) {
+  callback.Run();
+}
+
 // static
 void OzonePlatform::InitializeForUI() {
   CreateInstance();
   if (g_platform_initialized_ui)
     return;
   g_platform_initialized_ui = true;
   instance_->InitializeUI();
   // This is deliberately created after initializing so that the platform can
   // create its own version of DDM.
   DeviceDataManager::CreateInstance();
@@ skipping 27 matching lines @@
     // TODO(spang): Currently need to leak this object.
     OzonePlatform* pl = platform.release();
     DCHECK_EQ(instance_, pl);
   }
 }
 
 // static
 OzonePlatform* OzonePlatform::instance_;
 
 }  // namespace ui