Added method to synchronize command buffers within GpuControl.

components/mus/gles2/command_buffer_local.h

 // Copyright 2015 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 COMPONENTS_MUS_GLES2_COMMAND_BUFFER_LOCAL_H_
 #define COMPONENTS_MUS_GLES2_COMMAND_BUFFER_LOCAL_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 56 matching lines @@
                                      unsigned internalformat,
                                      unsigned usage) override;
   uint32_t InsertSyncPoint() override;
   uint32_t InsertFutureSyncPoint() override;
   void RetireSyncPoint(uint32_t sync_point) override;
   void SignalSyncPoint(uint32_t sync_point,
                        const base::Closure& callback) override;
   void SignalQuery(uint32_t query, const base::Closure& callback) override;
   void SetLock(base::Lock*) override;
   bool IsGpuChannelLost() override;
+  void SynchronizeCommandBuffer() override;
   gpu::CommandBufferNamespace GetNamespaceID() const override;
   uint64_t GetCommandBufferID() const override;
   int32_t GetExtraCommandBufferData() const override;
   uint64_t GenerateFenceSyncRelease() override;
   bool IsFenceSyncRelease(uint64_t release) override;
   bool IsFenceSyncFlushed(uint64_t release) override;
   bool IsFenceSyncFlushReceived(uint64_t release) override;
   void SignalSyncToken(const gpu::SyncToken& sync_token,
                        const base::Closure& callback) override;
   bool CanWaitUnverifiedSyncToken(const gpu::SyncToken* sync_token) override;
@@ skipping 26 matching lines @@
   uint64_t next_fence_sync_release_;
 
   base::WeakPtrFactory<CommandBufferLocal> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(CommandBufferLocal);
 };
 
 }  //  namespace mus
 
 #endif  // COMPONENTS_MUS_GLES2_COMMAND_BUFFER_LOCAL_H_