Use scroll customization primitives for touch scrolling (behind REF).

Source/core/frame/LocalFrame.h

 /*
  * Copyright (C) 1998, 1999 Torben Weis <weis@kde.org>
  *                     1999-2001 Lars Knoll <knoll@kde.org>
  *                     1999-2001 Antti Koivisto <koivisto@kde.org>
  *                     2000-2001 Simon Hausmann <hausmann@kde.org>
  *                     2000-2001 Dirk Mueller <mueller@kde.org>
  *                     2000 Stefan Schimanski <1Stein@gmx.de>
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) 2008 Eric Seidel <eric@webkit.org>
@@ skipping 144 matching lines @@
         String selectedTextForClipboard() const;
 
         VisiblePosition visiblePositionForPoint(const IntPoint& framePoint);
         Document* documentAtPoint(const IntPoint& windowPoint);
         PassRefPtrWillBeRawPtr<Range> rangeForPoint(const IntPoint& framePoint);
 
         bool isURLAllowed(const KURL&) const;
         bool shouldReuseDefaultView(const KURL&) const;
         void removeSpellingMarkersUnderWords(const Vector<String>& words);
 
+        // FIXME: once scroll customization is enabled everywhere
+        // (crbug.com/416862), this should take a ScrollState object.
+        bool applyScrollDelta(const FloatSize& delta, bool isScrollBegin);
+
 #if ENABLE(OILPAN)
         void registerPluginElement(HTMLPlugInElement*);
         void unregisterPluginElement(HTMLPlugInElement*);
         void clearWeakMembers(Visitor*);
 #endif
         DisplayItemClient displayItemClient() const { return toDisplayItemClient(this); }
         String debugName() const { return "LocalFrame"; }
 
         void setShouldSendDPRHint() { m_shouldSendDPRHint = true; }
         void setShouldSendRWHint() { m_shouldSendRWHint = true; }
@@ skipping 134 matching lines @@
     DEFINE_TYPE_CASTS(LocalFrame, Frame, localFrame, localFrame->isLocalFrame(), localFrame.isLocalFrame());
 
 } // namespace blink
 
 // During refactoring, there are some places where we need to do type conversions that
 // will not be needed once all instances of LocalFrame and RemoteFrame are sorted out.
 // At that time this #define will be removed and all the uses of it will need to be corrected.
 #define toLocalFrameTemporary toLocalFrame
 
 #endif // LocalFrame_h