Fixed up root scroller API to be more webby

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

Index: third_party/WebKit/Source/core/frame/FrameHost.h
diff --git a/third_party/WebKit/Source/core/frame/FrameHost.h b/third_party/WebKit/Source/core/frame/FrameHost.h
index 060e05685a81b0a709f44e133b19029c4073200f..8b909f23bd6bd4f772021ff2505edf2044f956bc 100644
--- a/third_party/WebKit/Source/core/frame/FrameHost.h
+++ b/third_party/WebKit/Source/core/frame/FrameHost.h
@@ -49,7 +49,6 @@ class OverscrollController;
 class Page;
 struct PageScaleConstraints;
 class PageScaleConstraintsSet;
-class RootScroller;
 class Settings;
 class TopControls;
 class UseCounter;
@@ -92,9 +91,6 @@ public:
     // This value does not account for Page zoom, use LocalFrame::devicePixelRatio instead.
     float deviceScaleFactor() const;
 
-    RootScroller* rootScroller();
-    const RootScroller* rootScroller() const;
-
     TopControls& topControls();
     const TopControls& topControls() const;
 
@@ -134,7 +130,6 @@ private:
     explicit FrameHost(Page&);
 
     const Member<Page> m_page;
-    const Member<RootScroller> m_rootScroller;
     const Member<TopControls> m_topControls;
     const OwnPtr<PageScaleConstraintsSet> m_pageScaleConstraintsSet;
     const Member<VisualViewport> m_visualViewport;