Update from https://crrev.com/308996

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 <map>
 #include <vector>
 
@@ skipping 34 matching lines @@
 }
 #endif
 
 namespace gpu {
 class ValueStateMap;
 
 namespace gles2 {
 class GLES2Decoder;
 class MailboxManager;
 class ShaderTranslatorCache;
+class SubscriptionRefSet;
 }
 
 class CommandBufferServiceBase;
 class GpuMemoryBufferManager;
 class GpuScheduler;
 class ImageFactory;
 class TransferBufferManagerInterface;
 
 // This class provides a thread-safe interface to the global GPU service (for
 // example GPU thread) when being run in single process mode.
@@ skipping 67 matching lines @@
     virtual void ScheduleTask(const base::Closure& task) = 0;
 
     // Schedules |callback| to run at an appropriate time for performing idle
     // work.
     virtual void ScheduleIdleWork(const base::Closure& task) = 0;
 
     virtual bool UseVirtualizedGLContexts() = 0;
     virtual scoped_refptr<gles2::ShaderTranslatorCache>
         shader_translator_cache() = 0;
     scoped_refptr<gles2::MailboxManager> mailbox_manager();
+    scoped_refptr<gles2::SubscriptionRefSet> subscription_ref_set();
     scoped_refptr<gpu::ValueStateMap> pending_valuebuffer_state();
 
    private:
     scoped_refptr<gles2::MailboxManager> mailbox_manager_;
+    scoped_refptr<gles2::SubscriptionRefSet> subscription_ref_set_;
     scoped_refptr<gpu::ValueStateMap> pending_valuebuffer_state_;
   };
 
 #if defined(OS_ANDROID)
   scoped_refptr<gfx::SurfaceTexture> GetSurfaceTexture(
       uint32 stream_id);
 #endif
 
  private:
   struct InitializeOnGpuThreadParams {
@@ skipping 92 matching lines @@
 
   base::WeakPtr<InProcessCommandBuffer> gpu_thread_weak_ptr_;
   base::WeakPtrFactory<InProcessCommandBuffer> gpu_thread_weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(InProcessCommandBuffer);
 };
 
 }  // namespace gpu
 
 #endif  // GPU_COMMAND_BUFFER_SERVICE_IN_PROCESS_COMMAND_BUFFER_H_