Remove some more frame-level scrolling machinery.

sky/engine/web/WebViewImpl.cpp

 /*
  * Copyright (C) 2011, 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 234 matching lines @@
 void WebViewImpl::handleMouseUp(LocalFrame& mainFrame, const WebMouseEvent& event)
 {
     PageWidgetEventHandler::handleMouseUp(mainFrame, event);
 }
 
 bool WebViewImpl::handleMouseWheel(LocalFrame& mainFrame, const WebMouseWheelEvent& event)
 {
     return PageWidgetEventHandler::handleMouseWheel(mainFrame, event);
 }
 
+// FIXME(sky): This appears to be unused.
 bool WebViewImpl::scrollBy(const WebFloatSize& delta, const WebFloatSize& velocity)
 {
     if (m_flingSourceDevice == WebGestureDeviceTouchpad) {
         WebMouseWheelEvent syntheticWheel;
         const float tickDivisor = WheelEvent::TickMultiplier;
 
         syntheticWheel.deltaX = delta.width;
         syntheticWheel.deltaY = delta.height;
         syntheticWheel.wheelTicksX = delta.width / tickDivisor;
         syntheticWheel.wheelTicksY = delta.height / tickDivisor;
@@ skipping 2275 matching lines @@
         m_layerTreeView->setVisible(visible);
     }
 }
 
 bool WebViewImpl::shouldDisableDesktopWorkarounds()
 {
     return true;
 }
 
 } // namespace blink