gpu: Add sync token dependencies to flush metadata.

gpu/ipc/client/command_buffer_proxy_impl.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_CLIENT_COMMAND_BUFFER_PROXY_IMPL_H_
 #define GPU_IPC_CLIENT_COMMAND_BUFFER_PROXY_IMPL_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 107 matching lines @@
   gpu::CommandBufferNamespace GetNamespaceID() const override;
   gpu::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 gpu::SyncToken& sync_token,
                        const base::Closure& callback) override;
-  bool CanWaitUnverifiedSyncToken(const gpu::SyncToken* sync_token) override;
+  void WaitSyncTokenHint(const gpu::SyncToken& sync_token) override;
+  bool CanWaitUnverifiedSyncToken(const gpu::SyncToken& sync_token) override;
 
   void TakeFrontBuffer(const gpu::Mailbox& mailbox);
   void ReturnFrontBuffer(const gpu::Mailbox& mailbox,
                          const gpu::SyncToken& sync_token,
                          bool is_lost);
 
   void AddDeletionObserver(DeletionObserver* observer);
   void RemoveDeletionObserver(DeletionObserver* observer);
 
   bool EnsureBackbuffer();
@@ skipping 114 matching lines @@
   // Client that wants to listen for important events on the GpuControl.
   gpu::GpuControlClient* gpu_control_client_;
 
   // Unowned list of DeletionObservers.
   base::ObserverList<DeletionObserver> deletion_observers_;
 
   scoped_refptr<GpuChannelHost> channel_;
   const gpu::CommandBufferId command_buffer_id_;
   const int32_t route_id_;
   const int32_t stream_id_;
-  uint32_t flush_count_;
-  int32_t last_put_offset_;
-  int32_t last_barrier_put_offset_;
+  uint32_t flush_count_ = 0;
+  int32_t last_put_offset_ = -1;
+  int32_t last_barrier_put_offset_ = -1;
 
   // Next generated fence sync.
-  uint64_t next_fence_sync_release_;
+  uint64_t next_fence_sync_release_ = 1;
+
+  std::vector<SyncToken> pending_sync_token_fences_;
 
   // Unverified flushed fence syncs with their corresponding flush id.
   std::queue<std::pair<uint64_t, uint32_t>> flushed_release_flush_id_;
 
   // Last flushed fence sync release, same as last item in queue if not empty.
-  uint64_t flushed_fence_sync_release_;
+  uint64_t flushed_fence_sync_release_ = 0;
 
   // Last verified fence sync.
-  uint64_t verified_fence_sync_release_;
+  uint64_t verified_fence_sync_release_ = 0;
 
   GpuConsoleMessageCallback console_message_callback_;
 
   // Tasks to be invoked in SignalSyncPoint responses.
-  uint32_t next_signal_id_;
+  uint32_t next_signal_id_ = 0;
   SignalTaskMap signal_tasks_;
 
   gpu::Capabilities capabilities_;
 
   std::vector<ui::LatencyInfo> latency_info_;
 
   SwapBuffersCompletionCallback swap_buffers_completion_callback_;
   UpdateVSyncParametersCallback update_vsync_parameters_completion_callback_;
 
   base::WeakPtr<CommandBufferProxyImpl> weak_this_;
   scoped_refptr<base::SequencedTaskRunner> callback_thread_;
 
   DISALLOW_COPY_AND_ASSIGN(CommandBufferProxyImpl);
 };
 
 }  // namespace gpu
 
 #endif  // GPU_IPC_CLIENT_COMMAND_BUFFER_PROXY_IMPL_H_