[cc] CompositorFrameSinkSupport: Defer BeginFrameAck of pending frames.

cc/surfaces/surface_factory.cc

 // 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.
 
 #include "cc/surfaces/surface_factory.h"
 
 #include <utility>
 
 #include "base/memory/ptr_util.h"
 #include "base/trace_event/trace_event.h"
@@ skipping 98 matching lines @@
     Surface* surface,
     const std::vector<SurfaceId>* active_referenced_surfaces,
     const std::vector<SurfaceId>* pending_referenced_surfaces) {
   client_->ReferencedSurfacesChanged(surface->surface_id().local_surface_id(),
                                      active_referenced_surfaces,
                                      pending_referenced_surfaces);
 }
 
 void SurfaceFactory::OnSurfaceActivated(Surface* surface) {
   DCHECK(surface->HasActiveFrame());
+
+  client_->PendingFrameActivated(surface->surface_id().local_surface_id());
+
   if (seen_first_frame_activation_)
     return;
 
   seen_first_frame_activation_ = true;
 
   const CompositorFrame& frame = surface->GetActiveFrame();
   // CompositorFrames might not be populated with a RenderPass in unit tests.
   gfx::Size frame_size;
   if (!frame.render_pass_list.empty())
     frame_size = frame.render_pass_list.back()->output_rect.size();
@@ skipping 19 matching lines @@
   surface->AddObserver(this);
   return surface;
 }
 
 void SurfaceFactory::Destroy(std::unique_ptr<Surface> surface) {
   surface->RemoveObserver(this);
   manager_->DestroySurface(std::move(surface));
 }
 
 }  // namespace cc