Make disable vsync run the renderer independently

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 6f174fa1ba9c6f5a34a119bcb4332c1dce0fc10a..8e805ed5b3c907a327eea1db109f2483ab0a62f5 100644
--- a/cc/scheduler/scheduler_settings.cc
+++ b/cc/scheduler/scheduler_settings.cc
@@ -9,13 +9,11 @@
 namespace cc {
 
 SchedulerSettings::SchedulerSettings()
-    : use_external_begin_frame_source(false),
-      main_frame_while_swap_throttled_enabled(false),
+    : main_frame_while_swap_throttled_enabled(false),
       main_frame_before_activation_enabled(false),
       commit_to_active_tree(false),
       timeout_and_draw_when_animation_checkerboards(true),
       using_synchronous_renderer_compositor(false),
-      throttle_frame_production(true),
       abort_commit_before_output_surface_creation(true),
       maximum_number_of_failed_draws_before_draw_is_forced(3),
       background_frame_interval(base::TimeDelta::FromSeconds(1)) {}
@@ -28,8 +26,6 @@ std::unique_ptr<base::trace_event::ConvertableToTraceFormat>
 SchedulerSettings::AsValue() const {
   std::unique_ptr<base::trace_event::TracedValue> state(
       new base::trace_event::TracedValue());
-  state->SetBoolean("use_external_begin_frame_source",
-                    use_external_begin_frame_source);
   state->SetBoolean("main_frame_while_swap_throttled_enabled",
                     main_frame_while_swap_throttled_enabled);
   state->SetBoolean("main_frame_before_activation_enabled",
@@ -41,7 +37,6 @@ SchedulerSettings::AsValue() const {
                     maximum_number_of_failed_draws_before_draw_is_forced);
   state->SetBoolean("using_synchronous_renderer_compositor",
                     using_synchronous_renderer_compositor);
-  state->SetBoolean("throttle_frame_production", throttle_frame_production);
   state->SetInteger("background_frame_interval",
                     background_frame_interval.InMicroseconds());
   state->SetBoolean("abort_commit_before_output_surface_creation",