Unified BeginFrame scheduling

cc/scheduler/scheduler_settings.h

Index: cc/scheduler/scheduler_settings.h
diff --git a/cc/scheduler/scheduler_settings.h b/cc/scheduler/scheduler_settings.h
index 65d29c8753a97200e9aab8bdfc0df7b054871077..885fef3bfaf6bc6e4be164e0deca69c17a878ca9 100644
--- a/cc/scheduler/scheduler_settings.h
+++ b/cc/scheduler/scheduler_settings.h
@@ -24,7 +24,9 @@ class CC_EXPORT SchedulerSettings {
   explicit SchedulerSettings(const LayerTreeSettings& settings);
   ~SchedulerSettings();
 
-  bool begin_frame_scheduling_enabled;
+  bool begin_frame_receiver;
+  bool begin_frame_publisher;
+  bool using_platform_vsync;

[brianderson, 2014/08/28 02:48:07]

Can you use begin_frame_receiver to represent using_platform_vsync, instead of
having two settings?

I think it makes sense for us to consider Android's and Mac's Browser as both a
BeginFrame receiver and publisher.

[simonhong, 2014/09/03 21:02:22]

I didn't think of using both option!
Using both in Android and Mac looks good.
Removed.

   bool main_frame_before_draw_enabled;
   bool main_frame_before_activation_enabled;
   bool impl_side_painting;