gpu: Allow waiting on sync tokens without sync token client.

gpu/ipc/in_process_command_buffer.h

Index: gpu/ipc/in_process_command_buffer.h
diff --git a/gpu/ipc/in_process_command_buffer.h b/gpu/ipc/in_process_command_buffer.h
index 02b1366e5f1734c47802196b5cf283cbeaa59898..6bc7066d72fa3f383ad94d623563bace7d12cc2e 100644
--- a/gpu/ipc/in_process_command_buffer.h
+++ b/gpu/ipc/in_process_command_buffer.h
@@ -237,12 +237,8 @@ class GPU_EXPORT InProcessCommandBuffer : public CommandBuffer,
   void ProcessTasksOnGpuThread();
   void CheckSequencedThread();
   void FenceSyncReleaseOnGpuThread(uint64_t release);
-  bool WaitFenceSyncOnGpuThread(gpu::CommandBufferNamespace namespace_id,
-                                gpu::CommandBufferId command_buffer_id,
-                                uint64_t release);
-  void OnWaitFenceSyncCompleted(CommandBufferNamespace namespace_id,
-                                CommandBufferId command_buffer_id,
-                                uint64_t release);
+  bool WaitSyncTokenOnGpuThread(const SyncToken& sync_token);
+  void OnWaitSyncTokenCompleted(const SyncToken& sync_token);
   void DescheduleUntilFinishedOnGpuThread();
   void RescheduleAfterFinishedOnGpuThread();
   void SignalSyncTokenOnGpuThread(const SyncToken& sync_token,