gpu: Add a new extension CHROMIUM_deschedule.

gpu/command_buffer/service/in_process_command_buffer.h

 // Copyright 2013 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 GPU_COMMAND_BUFFER_SERVICE_IN_PROCESS_COMMAND_BUFFER_H_
 #define GPU_COMMAND_BUFFER_SERVICE_IN_PROCESS_COMMAND_BUFFER_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 195 matching lines @@
   void ScheduleDelayedWorkOnGpuThread();
   bool MakeCurrent();
   base::Closure WrapCallback(const base::Closure& callback);
   State GetStateFast();
   void QueueTask(const base::Closure& task) { service_->ScheduleTask(task); }
   void CheckSequencedThread();
   void FenceSyncReleaseOnGpuThread(uint64_t release);
   bool WaitFenceSyncOnGpuThread(gpu::CommandBufferNamespace namespace_id,
                                 gpu::CommandBufferId command_buffer_id,
                                 uint64_t release);
+  void DescheduleUntilFinishedOnGpuThread();
+  void RescheduleAfterFinishedOnGpuThread();
   void SignalSyncTokenOnGpuThread(const SyncToken& sync_token,
                                   const base::Closure& callback);
   void SignalQueryOnGpuThread(unsigned query_id, const base::Closure& callback);
   void DestroyTransferBufferOnGpuThread(int32_t id);
   void CreateImageOnGpuThread(int32_t id,
                               const gfx::GpuMemoryBufferHandle& handle,
                               const gfx::Size& size,
                               gfx::BufferFormat format,
                               uint32_t internalformat,
                               uint32_t order_num,
@@ skipping 90 matching lines @@
   scoped_refptr<gpu::gles2::ShaderTranslatorCache> shader_translator_cache_;
   scoped_refptr<gpu::gles2::FramebufferCompletenessCache>
       framebuffer_completeness_cache_;
 
   DISALLOW_COPY_AND_ASSIGN(GpuInProcessThread);
 };
 
 }  // namespace gpu
 
 #endif  // GPU_COMMAND_BUFFER_SERVICE_IN_PROCESS_COMMAND_BUFFER_H_