Selectively disable rubber banding on mac.

Source/web/WebViewImpl.h

 /*
  * Copyright (C) 2010 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 117 matching lines @@
     virtual void didEnterFullScreen() OVERRIDE;
     virtual void willExitFullScreen() OVERRIDE;
     virtual void didExitFullScreen() OVERRIDE;
     virtual void animate(double) OVERRIDE;
     virtual void layout() OVERRIDE;
     virtual void enterForceCompositingMode(bool enable) OVERRIDE;
     virtual void paint(WebCanvas*, const WebRect&, PaintOptions = ReadbackFromCompositorIfAvailable) OVERRIDE;
     virtual bool isTrackingRepaints() const OVERRIDE;
     virtual void themeChanged() OVERRIDE;
     virtual bool handleInputEvent(const WebInputEvent&) OVERRIDE;
+    virtual bool handleInputEvent(const WebInputEvent&, bool canRubberbandLeft, bool canRubberbandRight) OVERRIDE;
     virtual void setCursorVisibilityState(bool isVisible) OVERRIDE;
     virtual bool hasTouchEventHandlersAt(const WebPoint&) OVERRIDE;
     virtual void applyScrollAndScale(const WebSize&, float) OVERRIDE;
     virtual void mouseCaptureLost() OVERRIDE;
     virtual void setFocus(bool enable) OVERRIDE;
     virtual bool setComposition(
         const WebString& text,
         const WebVector<WebCompositionUnderline>& underlines,
         int selectionStart,
         int selectionEnd) OVERRIDE;
@@ skipping 440 matching lines @@
     // Helper function: Widens the width of |source| by the specified margins
     // while keeping it smaller than page width.
     WebRect widenRectWithinPageBounds(const WebRect& source, int targetMargin, int minimumMargin);
 
     void pointerLockMouseEvent(const WebInputEvent&);
 
     // PageWidgetEventHandler functions
     virtual void handleMouseLeave(WebCore::LocalFrame&, const WebMouseEvent&) OVERRIDE;
     virtual void handleMouseDown(WebCore::LocalFrame&, const WebMouseEvent&) OVERRIDE;
     virtual void handleMouseUp(WebCore::LocalFrame&, const WebMouseEvent&) OVERRIDE;
-    virtual bool handleMouseWheel(WebCore::LocalFrame&, const WebMouseWheelEvent&) OVERRIDE;
+    virtual bool handleMouseWheel(WebCore::LocalFrame& mainFrame, const WebMouseWheelEvent&, bool canRubberbandLeft, bool canRubberbandRight) OVERRIDE;
     virtual bool handleGestureEvent(const WebGestureEvent&) OVERRIDE;
     virtual bool handleKeyEvent(const WebKeyboardEvent&) OVERRIDE;
     virtual bool handleCharEvent(const WebKeyboardEvent&) OVERRIDE;
 
     WebCore::InputMethodContext* inputMethodContext();
     WebPlugin* focusedPluginIfInputMethodSupported(WebCore::LocalFrame*);
 
     WebViewClient* m_client; // Can be 0 (e.g. unittests, shared workers, etc.)
     WebAutofillClient* m_autofillClient;
     WebSpellCheckClient* m_spellCheckClient;
@@ skipping 161 matching lines @@
     float m_zoomFactorOverride;
 };
 
 // We have no ways to check if the specified WebView is an instance of
 // WebViewImpl because WebViewImpl is the only implementation of WebView.
 DEFINE_TYPE_CASTS(WebViewImpl, WebView, webView, true, true);
 
 } // namespace blink
 
 #endif