cc: Emulate BeginFrame in OutputSurfaces that don't support it natively

cc/test/fake_output_surface.cc

 // Copyright 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.
 
 #include "cc/test/fake_output_surface.h"
 
 #include "base/bind.h"
 #include "base/message_loop.h"
 #include "cc/output/compositor_frame_ack.h"
 #include "cc/output/output_surface_client.h"
@@ skipping 28 matching lines @@
   MessageLoop::current()->PostTask(
       FROM_HERE, base::Bind(&FakeOutputSurface::SendFrameAck,
                             weak_ptr_factory_.GetWeakPtr()));
 }
 
 void FakeOutputSurface::SetNeedsBeginFrame(bool enable) {
   needs_begin_frame_ = enable;
 }
 
 void FakeOutputSurface::BeginFrame(base::TimeTicks frame_time) {
-  client_->BeginFrame(frame_time);
+  BeginFrame(frame_time);
 }
 
 bool FakeOutputSurface::ForcedDrawToSoftwareDevice() const {
   return forced_draw_to_software_device_;
 }
 
 void FakeOutputSurface::SendFrameAck() {
   CompositorFrameAck ack;
-  client_->OnSendFrameToParentCompositorAck(ack);
+  OnSendFrameToParentCompositorAck(ack);
 }
 
 }  // namespace cc