gpu: Add sync token dependencies to flush metadata.

gpu/command_buffer/tests/gl_manager.h

Index: gpu/command_buffer/tests/gl_manager.h
diff --git a/gpu/command_buffer/tests/gl_manager.h b/gpu/command_buffer/tests/gl_manager.h
index b8877d6157524dc5422d24975783054b6b891a57..073b56a1435366a549e7dbdb87d537b986b2f944 100644
--- a/gpu/command_buffer/tests/gl_manager.h
+++ b/gpu/command_buffer/tests/gl_manager.h
@@ -146,7 +146,8 @@ class GLManager : private GpuControl {
   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;
 
  private:
   void PumpCommands();