Remove FrameView::Root

third_party/WebKit/Source/core/frame/FrameView.cpp

Index: third_party/WebKit/Source/core/frame/FrameView.cpp
diff --git a/third_party/WebKit/Source/core/frame/FrameView.cpp b/third_party/WebKit/Source/core/frame/FrameView.cpp
index 542638cc60e7f3ee01de268029f41c582d0ef704..5e8e7341e02c6ab8a2594ca484eea4a8b104ed0b 100644
--- a/third_party/WebKit/Source/core/frame/FrameView.cpp
+++ b/third_party/WebKit/Source/core/frame/FrameView.cpp
@@ -3848,13 +3848,6 @@ void FrameView::RemoveAnimatingScrollableArea(ScrollableArea* scrollable_area) {
   animating_scrollable_areas_->erase(scrollable_area);
 }
 
-FrameView* FrameView::Root() const {
-  const FrameView* top = this;
-  while (top->Parent())
-    top = ToFrameView(top->Parent());
-  return const_cast<FrameView*>(top);
-}
-
 void FrameView::SetParent(FrameViewBase* parent_frame_view_base) {
   FrameView* parent = ToFrameView(parent_frame_view_base);
   if (parent == parent_)