gpu: Add a new extension CHROMIUM_deschedule.

gpu/ipc/service/gpu_command_buffer_stub.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 GPU_IPC_SERVICE_GPU_COMMAND_BUFFER_STUB_H_
 #define GPU_IPC_SERVICE_GPU_COMMAND_BUFFER_STUB_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 163 matching lines @@
   void OnSignalQuery(uint32_t query, uint32_t id);
 
   void OnFenceSyncRelease(uint64_t release);
   bool OnWaitFenceSync(CommandBufferNamespace namespace_id,
                        CommandBufferId command_buffer_id,
                        uint64_t release);
   void OnWaitFenceSyncCompleted(CommandBufferNamespace namespace_id,
                                 CommandBufferId command_buffer_id,
                                 uint64_t release);
 
+  void OnDescheduleUntilFinished();
+  void OnRescheduleAfterFinished();
+
   void OnCreateImage(const GpuCommandBufferMsg_CreateImage_Params& params);
   void OnDestroyImage(int32_t id);
   void OnCreateStreamTexture(uint32_t texture_id,
                              int32_t stream_id,
                              bool* succeeded);
   void OnCommandProcessed();
   void OnParseError();
 
   void ReportState();
 
@@ skipping 53 matching lines @@
 
   std::unique_ptr<WaitForCommandState> wait_for_token_;
   std::unique_ptr<WaitForCommandState> wait_for_get_offset_;
 
   DISALLOW_COPY_AND_ASSIGN(GpuCommandBufferStub);
 };
 
 }  // namespace gpu
 
 #endif  // GPU_IPC_SERVICE_GPU_COMMAND_BUFFER_STUB_H_