Remove external begin frame source parameter and settings

cc/scheduler/scheduler.h

Index: cc/scheduler/scheduler.h
diff --git a/cc/scheduler/scheduler.h b/cc/scheduler/scheduler.h
index ce505584a9574398822a3fca975bcebceeace793..57470da922e0021a0dc9a6662c58fa25ff51249a 100644
--- a/cc/scheduler/scheduler.h
+++ b/cc/scheduler/scheduler.h
@@ -54,14 +54,11 @@ class SchedulerClient {
 
 class CC_EXPORT Scheduler : public BeginFrameObserverBase {
  public:
-  static std::unique_ptr<Scheduler> Create(
-      SchedulerClient* client,
-      const SchedulerSettings& scheduler_settings,
-      int layer_tree_host_id,
-      base::SingleThreadTaskRunner* task_runner,
-      BeginFrameSource* begin_frame_source,
-      std::unique_ptr<CompositorTimingHistory> compositor_timing_history);
-
+  Scheduler(SchedulerClient* client,
+            const SchedulerSettings& scheduler_settings,
+            int layer_tree_host_id,
+            base::SingleThreadTaskRunner* task_runner,
+            std::unique_ptr<CompositorTimingHistory> compositor_timing_history);
   ~Scheduler() override;
 
   // BeginFrameObserverBase
@@ -138,13 +135,6 @@ class CC_EXPORT Scheduler : public BeginFrameObserverBase {
   }
 
  protected:
-  Scheduler(SchedulerClient* client,
-            const SchedulerSettings& scheduler_settings,
-            int layer_tree_host_id,
-            base::SingleThreadTaskRunner* task_runner,
-            BeginFrameSource* begin_frame_source,
-            std::unique_ptr<CompositorTimingHistory> compositor_timing_history);
-
   // Virtual for testing.
   virtual base::TimeTicks Now() const;