gpu: Add sync token dependencies to flush metadata.

gpu/ipc/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_IPC_IN_PROCESS_COMMAND_BUFFER_H_
 #define GPU_IPC_IN_PROCESS_COMMAND_BUFFER_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 110 matching lines @@
   CommandBufferNamespace GetNamespaceID() const override;
   CommandBufferId 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;
   bool IsFenceSyncReleased(uint64_t release) override;
   void SignalSyncToken(const SyncToken& sync_token,
                        const base::Closure& callback) override;
-  bool CanWaitUnverifiedSyncToken(const SyncToken* sync_token) override;
+  void WaitSyncTokenHint(const SyncToken& sync_token) override;
+  bool CanWaitUnverifiedSyncToken(const SyncToken& sync_token) override;
 
 // ImageTransportSurfaceDelegate implementation:
 #if defined(OS_WIN)
   void DidCreateAcceleratedSurfaceChildWindow(
       SurfaceHandle parent_window,
       SurfaceHandle child_window) override;
 #endif
   void DidSwapBuffersComplete(SwapBuffersCompleteParams params) override;
   const gles2::FeatureInfo* GetFeatureInfo() const override;
   void SetLatencyInfoCallback(const LatencyInfoCallback& callback) override;
@@ skipping 185 matching lines @@
   base::WeakPtr<InProcessCommandBuffer> gpu_thread_weak_ptr_;
   base::WeakPtrFactory<InProcessCommandBuffer> client_thread_weak_ptr_factory_;
   base::WeakPtrFactory<InProcessCommandBuffer> gpu_thread_weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(InProcessCommandBuffer);
 };
 
 }  // namespace gpu
 
 #endif  // GPU_IPC_IN_PROCESS_COMMAND_BUFFER_H_