Remove ScrollableArea::GetFrameViewBase and move ScheduleAnimation into subclasses.

third_party/WebKit/Source/core/frame/LocalFrame.h

Index: third_party/WebKit/Source/core/frame/LocalFrame.h
diff --git a/third_party/WebKit/Source/core/frame/LocalFrame.h b/third_party/WebKit/Source/core/frame/LocalFrame.h
index d6e5d1829d8d4b721fe8baf6ef01225ef17c74a1..ed77ae9845a5639241227c5b34edf9753314be98 100644
--- a/third_party/WebKit/Source/core/frame/LocalFrame.h
+++ b/third_party/WebKit/Source/core/frame/LocalFrame.h
@@ -61,6 +61,7 @@ class FrameSelection;
 class FrameView;
 class InputMethodController;
 class CoreProbeSink;
+class HostWindow;
 class InterfaceProvider;
 class InterfaceRegistry;
 class IntPoint;
@@ -235,6 +236,8 @@ class CORE_EXPORT LocalFrame final : public Frame,
   // for adding a callback multiple times.
   static void RegisterInitializationCallback(FrameInitCallback);
 
+  bool ScheduleAnimation(HostWindow*);
+
  private:
   friend class FrameNavigationDisabler;