cc: Send all begin frames using a PostTask.

content/browser/compositor/gpu_process_transport_factory.cc

Index: content/browser/compositor/gpu_process_transport_factory.cc
diff --git a/content/browser/compositor/gpu_process_transport_factory.cc b/content/browser/compositor/gpu_process_transport_factory.cc
index eb8a14234b2397409326c32545034ec7b0619c1d..6c18abd5658a88aeab470101c313aee1e0722c81 100644
--- a/content/browser/compositor/gpu_process_transport_factory.cc
+++ b/content/browser/compositor/gpu_process_transport_factory.cc
@@ -477,13 +477,11 @@ void GpuProcessTransportFactory::EstablishedGpuChannel(
 
   std::unique_ptr<cc::SyntheticBeginFrameSource> begin_frame_source;
   if (!compositor->GetRendererSettings().disable_display_vsync) {
-    begin_frame_source.reset(new cc::DelayBasedBeginFrameSource(
-        base::MakeUnique<cc::DelayBasedTimeSource>(
-            compositor->task_runner().get())));
+    begin_frame_source.reset(
+        new cc::DelayBasedBeginFrameSource(compositor->task_runner().get()));
   } else {
-    begin_frame_source.reset(new cc::BackToBackBeginFrameSource(
-        base::MakeUnique<cc::DelayBasedTimeSource>(
-            compositor->task_runner().get())));
+    begin_frame_source.reset(
+        new cc::BackToBackBeginFrameSource(compositor->task_runner().get()));
   }
 
   std::unique_ptr<BrowserCompositorOutputSurface> display_output_surface;
@@ -665,7 +663,9 @@ void GpuProcessTransportFactory::RemoveCompositor(ui::Compositor* compositor) {
 #endif
 }
 
-bool GpuProcessTransportFactory::DoesCreateTestContexts() { return false; }
+bool GpuProcessTransportFactory::DoesCreateTestContexts() {
+  return false;
+}
 
 uint32_t GpuProcessTransportFactory::GetImageTextureTarget(
     gfx::BufferFormat format,
@@ -873,7 +873,7 @@ void GpuProcessTransportFactory::OnLostMainThreadSharedContext() {
   // the same share group.
   scoped_refptr<cc::ContextProvider> lost_shared_main_thread_contexts =
       shared_main_thread_contexts_;
-  shared_main_thread_contexts_  = NULL;
+  shared_main_thread_contexts_ = NULL;
 
   std::unique_ptr<display_compositor::GLHelper> lost_gl_helper =
       std::move(gl_helper_);
@@ -883,7 +883,7 @@ void GpuProcessTransportFactory::OnLostMainThreadSharedContext() {
 
   // Kill things that use the shared context before killing the shared context.
   lost_gl_helper.reset();
-  lost_shared_main_thread_contexts  = NULL;
+  lost_shared_main_thread_contexts = NULL;
 }
 
 scoped_refptr<cc::VulkanInProcessContextProvider>