cc: Implement unified BeginFrame on aura

cc/scheduler/scheduler_settings.cc

Index: cc/scheduler/scheduler_settings.cc
diff --git a/cc/scheduler/scheduler_settings.cc b/cc/scheduler/scheduler_settings.cc
index 871339130d5359c466432f0aa839a0b98f1e76a4..96192bab3a648c7f25049ce7207bf6c45d78ccb9 100644
--- a/cc/scheduler/scheduler_settings.cc
+++ b/cc/scheduler/scheduler_settings.cc
@@ -11,7 +11,6 @@ namespace cc {
 
 SchedulerSettings::SchedulerSettings()
     : use_external_begin_frame_source(false),
-      forward_begin_frames_to_children(false),
       main_frame_before_activation_enabled(false),
       impl_side_painting(false),
       timeout_and_draw_when_animation_checkerboards(true),
@@ -25,8 +24,6 @@ SchedulerSettings::SchedulerSettings()
 
 SchedulerSettings::SchedulerSettings(const LayerTreeSettings& settings)
     : use_external_begin_frame_source(settings.use_external_begin_frame_source),
-      forward_begin_frames_to_children(
-          settings.forward_begin_frames_to_children),
       main_frame_before_activation_enabled(
           settings.main_frame_before_activation_enabled),
       impl_side_painting(settings.impl_side_painting),
@@ -52,8 +49,6 @@ SchedulerSettings::AsValue() const {
       new base::trace_event::TracedValue();
   state->SetBoolean("use_external_begin_frame_source",
                     use_external_begin_frame_source);
-  state->SetBoolean("forward_begin_frames_to_children",
-                    forward_begin_frames_to_children);
   state->SetBoolean("main_frame_before_activation_enabled",
                     main_frame_before_activation_enabled);
   state->SetBoolean("impl_side_painting", impl_side_painting);