Remove ScrollableArea::GetFrameViewBase and move ScheduleAnimation into subclasses.

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

Index: third_party/WebKit/Source/core/page/AutoscrollController.cpp
diff --git a/third_party/WebKit/Source/core/page/AutoscrollController.cpp b/third_party/WebKit/Source/core/page/AutoscrollController.cpp
index f44a334f6e8a11f5499b59e21edf64b289fa6e1e..4765eafa763028118062592e6d089c936ef68715 100644
--- a/third_party/WebKit/Source/core/page/AutoscrollController.cpp
+++ b/third_party/WebKit/Source/core/page/AutoscrollController.cpp
@@ -366,14 +366,15 @@ void AutoscrollController::Animate(double) {
       }
       break;
   }
-  if (autoscroll_type_ != kNoAutoscroll && autoscroll_layout_object_)
+  if (autoscroll_type_ != kNoAutoscroll && autoscroll_layout_object_) {
     page_->GetChromeClient().ScheduleAnimation(
-        autoscroll_layout_object_->GetFrame()->View());
+        autoscroll_layout_object_->GetFrame());
+  }
 }
 
 void AutoscrollController::StartAutoscroll() {
   page_->GetChromeClient().ScheduleAnimation(
-      autoscroll_layout_object_->GetFrame()->View());
+      autoscroll_layout_object_->GetFrame());
 }
 
 void AutoscrollController::UpdateMiddleClickAutoscrollState(