Make SingleThreadProxy a SchedulerClient

cc/trees/thread_proxy.cc

Index: cc/trees/thread_proxy.cc
diff --git a/cc/trees/thread_proxy.cc b/cc/trees/thread_proxy.cc
index 82e13d2188351e4775823ff2228e843f36af39cc..7a79ac911576d52557edf02932af716057f513f2 100644
--- a/cc/trees/thread_proxy.cc
+++ b/cc/trees/thread_proxy.cc
@@ -1468,17 +1468,7 @@ void ThreadProxy::InitializeImplOnImplThread(CompletionEvent* completion) {
   DCHECK(IsImplThread());
   impl().layer_tree_host_impl =
       layer_tree_host()->CreateLayerTreeHostImpl(this);
-  const LayerTreeSettings& settings = layer_tree_host()->settings();
-  SchedulerSettings scheduler_settings;
-  scheduler_settings.impl_side_painting = settings.impl_side_painting;
-  scheduler_settings.timeout_and_draw_when_animation_checkerboards =
-      settings.timeout_and_draw_when_animation_checkerboards;
-  scheduler_settings.maximum_number_of_failed_draws_before_draw_is_forced_ =
-      settings.maximum_number_of_failed_draws_before_draw_is_forced_;
-  scheduler_settings.using_synchronous_renderer_compositor =
-      settings.using_synchronous_renderer_compositor;
-  scheduler_settings.throttle_frame_production =
-      settings.throttle_frame_production;
+  SchedulerSettings scheduler_settings(layer_tree_host()->settings());
   impl().scheduler =
       Scheduler::Create(this, scheduler_settings, impl().layer_tree_host_id);
   impl().scheduler->SetVisible(impl().layer_tree_host_impl->visible());