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 77 matching lines @@
 
   virtual void TearDown() OVERRIDE {}
 
   virtual void DidTryInitializeRendererOnImplThread(
       bool success,
       scoped_refptr<ContextProvider> offscreen_context_provider) OVERRIDE {
     did_try_initialize_renderer_ = true;
   }
   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 5757 matching lines @@
   EXPECT_FALSE(did_try_initialize_renderer_);
   host_impl_->DeferredInitialize(scoped_refptr<ContextProvider>());
   EXPECT_TRUE(did_try_initialize_renderer_);
 
   // Defer intialized GL draw.
   DrawFrame();
 }
 
 }  // namespace
 }  // namespace cc