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

cc/trees/layer_tree_host_impl_unittest.cc

 // Copyright 2011 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/trees/layer_tree_host_impl.h"
 
 #include <cmath>
 
 #include "base/bind.h"
 #include "base/command_line.h"
@@ skipping 74 matching lines @@
                                            &proxy_,
                                            &stats_instrumentation_);
     host_impl_->InitializeRenderer(CreateOutputSurface());
     host_impl_->SetViewportSize(gfx::Size(10, 10));
   }
 
   virtual void TearDown() OVERRIDE {}
 
   virtual void DidLoseOutputSurfaceOnImplThread() OVERRIDE {}
   virtual void OnSwapBuffersCompleteOnImplThread() OVERRIDE {}
-  virtual void OnVSyncParametersChanged(base::TimeTicks timebase,
-                                        base::TimeDelta interval) OVERRIDE {}
   virtual void BeginFrameOnImplThread(base::TimeTicks frame_time)
       OVERRIDE {}
   virtual void OnCanDrawStateChanged(bool can_draw) OVERRIDE {
     on_can_draw_state_changed_called_ = true;
   }
   virtual void OnHasPendingTreeStateChanged(bool has_pending_tree) OVERRIDE {
     has_pending_tree_ = has_pending_tree;
   }
   virtual void SetNeedsRedrawOnImplThread() OVERRIDE {
     did_request_redraw_ = true;
@@ skipping 5726 matching lines @@
   EXPECT_TRUE(host_impl_->PrepareToDraw(&frame, gfx::Rect()));
   host_impl_->DrawLayers(&frame, base::TimeTicks::Now());
   host_impl_->DidDrawAllLayers(frame);
 
   EXPECT_EQ(1u, frame.will_draw_layers.size());
   EXPECT_EQ(host_impl_->active_tree()->root_layer(), frame.will_draw_layers[0]);
 }
 
 }  // namespace
 }  // namespace cc