cc: Send all begin frames using a PostTask.

services/ui/surfaces/display_compositor.cc

 // Copyright 2016 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 "services/ui/surfaces/display_compositor.h"
 
 #include "cc/output/copy_output_request.h"
 #include "cc/output/output_surface.h"
 #include "cc/output/renderer_settings.h"
 #include "cc/output/texture_mailbox_deleter.h"
@@ skipping 23 matching lines @@
   allocator_.RegisterSurfaceIdNamespace(surfaces_state_->manager());
   surfaces_state_->manager()->RegisterSurfaceFactoryClient(
       allocator_.id_namespace(), this);
 
   scoped_refptr<SurfacesContextProvider> surfaces_context_provider(
       new SurfacesContextProvider(widget, gpu_state));
   // TODO(rjkroege): If there is something better to do than CHECK, add it.
   CHECK(surfaces_context_provider->BindToCurrentThread());
 
   std::unique_ptr<cc::SyntheticBeginFrameSource> synthetic_begin_frame_source(
-      new cc::DelayBasedBeginFrameSource(
-          base::MakeUnique<cc::DelayBasedTimeSource>(task_runner_.get())));
+      new cc::DelayBasedBeginFrameSource(task_runner_.get()));
 
   std::unique_ptr<cc::OutputSurface> display_output_surface;
   if (surfaces_context_provider->ContextCapabilities().surfaceless) {
 #if defined(USE_OZONE)
     display_output_surface = base::WrapUnique(new DirectOutputSurfaceOzone(
         surfaces_context_provider, widget, synthetic_begin_frame_source.get(),
         GL_TEXTURE_2D, GL_RGB));
 #else
     NOTREACHED();
 #endif
@@ skipping 59 matching lines @@
 void DisplayCompositor::DisplayOutputSurfaceLost() {
   // TODO(fsamuel): This looks like it would crash if a frame was in flight and
   // will be submitted.
   display_.reset();
 }
 
 void DisplayCompositor::DisplaySetMemoryPolicy(
     const cc::ManagedMemoryPolicy& policy) {}
 
 }  // namespace ui