Make disable vsync run the renderer independently

cc/trees/layer_tree_settings.cc

Index: cc/trees/layer_tree_settings.cc
diff --git a/cc/trees/layer_tree_settings.cc b/cc/trees/layer_tree_settings.cc
index 60ac1dc4e5d41c94740f4e18d823b197c617fdb4..3bfaebc680661c792ed130422aaa19b9b2684c04 100644
--- a/cc/trees/layer_tree_settings.cc
+++ b/cc/trees/layer_tree_settings.cc
@@ -76,7 +76,6 @@ bool LayerTreeSettings::operator==(const LayerTreeSettings& other) const {
          verify_transform_tree_calculations ==
              other.verify_transform_tree_calculations &&
          image_decode_tasks_enabled == other.image_decode_tasks_enabled &&
-         wait_for_beginframe_interval == other.wait_for_beginframe_interval &&
          max_staging_buffer_usage_in_bytes ==
              other.max_staging_buffer_usage_in_bytes &&
          memory_policy_ == other.memory_policy_ &&
@@ -87,15 +86,12 @@ bool LayerTreeSettings::operator==(const LayerTreeSettings& other) const {
 
 SchedulerSettings LayerTreeSettings::ToSchedulerSettings() const {
   SchedulerSettings scheduler_settings;
-  scheduler_settings.use_external_begin_frame_source =
-      use_external_begin_frame_source;
   scheduler_settings.main_frame_before_activation_enabled =
       main_frame_before_activation_enabled;
   scheduler_settings.timeout_and_draw_when_animation_checkerboards =
       timeout_and_draw_when_animation_checkerboards;
   scheduler_settings.using_synchronous_renderer_compositor =
       using_synchronous_renderer_compositor;
-  scheduler_settings.throttle_frame_production = wait_for_beginframe_interval;
   scheduler_settings.background_frame_interval =
       base::TimeDelta::FromSecondsD(1.0 / background_animation_rate);
   scheduler_settings.abort_commit_before_output_surface_creation =