Fork cc::OutputSurface into cc::CompositorFrameSink.

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 bc047179444b5e0f283eee54cf2005d242c0457b..70388b454c61ea05ca860fb79faf205ea3a15353 100644
--- a/cc/scheduler/scheduler_settings.h
+++ b/cc/scheduler/scheduler_settings.h
@@ -26,17 +26,17 @@ class CC_EXPORT SchedulerSettings {
   SchedulerSettings(const SchedulerSettings& other);
   ~SchedulerSettings();
 
-  bool use_external_begin_frame_source;
-  bool main_frame_while_swap_throttled_enabled;
-  bool main_frame_before_activation_enabled;
-  bool commit_to_active_tree;
-  bool timeout_and_draw_when_animation_checkerboards;
-  bool using_synchronous_renderer_compositor;
-  bool throttle_frame_production;
-  bool abort_commit_before_output_surface_creation;
-
-  int maximum_number_of_failed_draws_before_draw_is_forced;
-  base::TimeDelta background_frame_interval;
+  bool use_external_begin_frame_source = false;
+  bool main_frame_while_swap_throttled_enabled = false;
+  bool main_frame_before_activation_enabled = false;
+  bool commit_to_active_tree = false;
+  bool timeout_and_draw_when_animation_checkerboards = true;
+  bool using_synchronous_renderer_compositor = false;
+  bool throttle_frame_production = true;
+  bool abort_commit_before_compositor_frame_sink_creation = true;
+
+  int maximum_number_of_failed_draws_before_draw_is_forced = 3;
+  base::TimeDelta background_frame_interval = base::TimeDelta::FromSeconds(1);
 
   std::unique_ptr<base::trace_event::ConvertableToTraceFormat> AsValue() const;
 };