[Android] Suspend shared timers for hidden renderers

content/renderer/render_thread_impl.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_RENDERER_RENDER_THREAD_IMPL_H_
 #define CONTENT_RENDERER_RENDER_THREAD_IMPL_H_
 
 #include <set>
 #include <string>
 #include <vector>
@@ skipping 415 matching lines @@
   RenderThreadImpl(const InProcessChildThreadParams& params,
                    scoped_ptr<scheduler::RendererScheduler> scheduler);
   RenderThreadImpl(scoped_ptr<base::MessageLoop> main_message_loop,
                    scoped_ptr<scheduler::RendererScheduler> scheduler);
   virtual void SetResourceDispatchTaskQueue(
     const scoped_refptr<base::SingleThreadTaskRunner>& resource_task_queue);
 
  private:
   // ChildThread
   bool OnControlMessageReceived(const IPC::Message& msg) override;
+  void OnProcessBackgrounded(bool backgrounded) override;
 
   // GpuChannelHostFactory implementation:
   bool IsMainThread() override;
   scoped_refptr<base::SingleThreadTaskRunner> GetIOThreadTaskRunner() override;
   scoped_ptr<base::SharedMemory> AllocateSharedMemory(size_t size) override;
   CreateCommandBufferResult CreateViewCommandBuffer(
       int32 surface_id,
       const GPUCreateCommandBufferConfig& init_params,
       int32 route_id) override;
 
@@ skipping 210 matching lines @@
   DISALLOW_COPY_AND_ASSIGN(RenderThreadImpl);
 };
 
 #if defined(COMPILER_MSVC)
 #pragma warning(pop)
 #endif
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_RENDER_THREAD_IMPL_H_