|  | // Copyright 2014 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 CC_OUTPUT_VSYNC_PARAMETER_OBSERVER_H_ | 
|  | #define CC_OUTPUT_VSYNC_PARAMETER_OBSERVER_H_ | 
|  |  | 
|  | #include "base/time/time.h" | 
|  |  | 
|  | // Interface for a class which observes the parameters regarding vsync | 
|  | // information. | 
|  | class VSyncParameterObserver { | 
|  | public: | 
|  | virtual void OnUpdateVSyncParameters(base::TimeTicks timebase, | 
|  | base::TimeDelta interval) = 0; | 
|  | }; | 
|  |  | 
|  | #endif  // CC_OUTPUT_VSYNC_PARAMETER_OBSERVER_H_ |