Moving background animation ticking from LayerTreeHostImpl into the Scheduler.

cc/scheduler/scheduler.cc

Index: cc/scheduler/scheduler.cc
diff --git a/cc/scheduler/scheduler.cc b/cc/scheduler/scheduler.cc
index 88c27c103e33fe2d85302772a302663515a5715c..4c2316fc048ac5d8bee6004f850621d398b7eed3 100644
--- a/cc/scheduler/scheduler.cc
+++ b/cc/scheduler/scheduler.cc
@@ -62,9 +62,9 @@ SchedulerFrameSourcesConstructor::ConstructBackgroundFrameSource(
                "SyntheticBeginFrameSource");
   DCHECK(!(scheduler->background_frame_source_internal_));
   scheduler->background_frame_source_internal_ =
-      SyntheticBeginFrameSource::Create(scheduler->task_runner_.get(),
-                                        scheduler->Now(),
-                                        base::TimeDelta::FromSeconds(1));
+      SyntheticBeginFrameSource::Create(
+          scheduler->task_runner_.get(), scheduler->Now(),
+          scheduler->settings_.background_frame_interval);
   return scheduler->background_frame_source_internal_.get();
 }