Remove more frame-level scrolling machinery.

sky/engine/core/frame/FrameView.h

Index: sky/engine/core/frame/FrameView.h
diff --git a/sky/engine/core/frame/FrameView.h b/sky/engine/core/frame/FrameView.h
index e946050b004a52a433fccbb9491c383c0cdf20dd..2ceb7c49b48aa098385dd4ff560c2ac4fc8c855b 100644
--- a/sky/engine/core/frame/FrameView.h
+++ b/sky/engine/core/frame/FrameView.h
@@ -219,10 +219,6 @@ public:
     IntPoint contentsToWindow(const IntPoint& contentsPoint) const { return contentsToWindow(contentsPoint); }
     IntRect windowToContents(const IntRect& windowRect) const { return convertFromContainingWindow(windowRect); }
     IntRect contentsToWindow(const IntRect& contentsRect) const { return contentsToWindow(contentsRect); }
-    IntSize scrollOffset() const { return IntSize(); }
-    IntPoint minimumScrollPosition() const { return IntPoint(); }
-    IntPoint maximumScrollPosition() const { return IntPoint(); }
-    IntPoint scrollPosition() const { return IntPoint(); }
     bool scheduleAnimation();
     IntRect visibleContentRect(IncludeScrollbarsInRect = ExcludeScrollbars) const { return IntRect(IntPoint(), expandedIntSize(frameRect().size())); }
     IntSize unscaledVisibleContentSize(IncludeScrollbarsInRect = ExcludeScrollbars) const { return frameRect().size(); }
@@ -271,9 +267,6 @@ private:
     bool wasViewportResized();
     void sendResizeEventIfNeeded();
 
-    void scrollPositionChanged();
-    void didScrollTimerFired(Timer<FrameView>*);
-
     void updateCompositedSelectionBoundsIfNeeded();
 
     void setLayoutSizeInternal(const IntSize&);
@@ -341,8 +334,6 @@ private:
     IntSize m_layoutSize;
     bool m_layoutSizeFixedToFrameSize;
 
-    Timer<FrameView> m_didScrollTimer;
-
     Vector<IntRect> m_tickmarks;
 };