Remove ScrollableArea::GetFrameViewBase and move ScheduleAnimation into subclasses.

third_party/WebKit/Source/core/page/PageAnimator.cpp

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "core/page/PageAnimator.h"
 
 #include "core/animation/DocumentAnimations.h"
 #include "core/frame/FrameView.h"
 #include "core/frame/LocalFrame.h"
 #include "core/page/ChromeClient.h"
@@ skipping 73 matching lines @@
          !suppress_frame_requests);
   suppress_frame_requests_workaround_for704763_only_ = suppress_frame_requests;
 }
 
 DISABLE_CFI_PERF
 void PageAnimator::ScheduleVisualUpdate(LocalFrame* frame) {
   if (servicing_animations_ || updating_layout_and_style_for_painting_ ||
       suppress_frame_requests_workaround_for704763_only_) {
     return;
   }
-  page_->GetChromeClient().ScheduleAnimation(frame->View());
+  page_->GetChromeClient().ScheduleAnimation(frame);
 }
 
 void PageAnimator::UpdateAllLifecyclePhases(LocalFrame& root_frame) {
   FrameView* view = root_frame.View();
   AutoReset<bool> servicing(&updating_layout_and_style_for_painting_, true);
   view->UpdateAllLifecyclePhases();
 }
 
 }  // namespace blink