Introduce Display Compositor mojo interface. Use InProcessContextProvider.

services/ui/surfaces/surfaces_context_provider_delegate.h

-// Copyright 2015 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 SERVICES_UI_SURFACES_SURFACES_CONTEXT_PROVIDER_DELEGATE_H_
-#define SERVICES_UI_SURFACES_SURFACES_CONTEXT_PROVIDER_DELEGATE_H_
-
-#include <stdint.h>
-
-namespace base {
-class TimeDelta;
-class TimeTicks;
-}
-
-namespace ui {
-
-class SurfacesContextProviderDelegate {
- public:
-  virtual void OnVSyncParametersUpdated(const base::TimeTicks& timebase,
-                                        const base::TimeDelta& interval) = 0;
-
- protected:
-  virtual ~SurfacesContextProviderDelegate() {}
-};
-
-}  // namespace ui
-
-#endif  // SERVICES_UI_SURFACES_SURFACES_CONTEXT_PROVIDER_DELEGATE_H_