Selectively disable rubber banding on mac.

Source/core/frame/FrameView.h

Index: Source/core/frame/FrameView.h
diff --git a/Source/core/frame/FrameView.h b/Source/core/frame/FrameView.h
index 4f53c0ec638658904f20c64ec61efe9c624bfa94..abd9e6678408c33b6972cef15765fb50e5befacf 100644
--- a/Source/core/frame/FrameView.h
+++ b/Source/core/frame/FrameView.h
@@ -284,7 +284,7 @@ public:
     // This function exists for ports that need to handle wheel events manually.
     // On Mac WebKit1 the underlying NSScrollView just does the scrolling, but on most other platforms

[Nico, 2014/03/14 17:51:46]

(this comment can mostly go away)

[erikchen, 2014/03/20 18:04:26]

After following asvitkine's suggestion, I am no longer touching this file or
core/. I will not perform this clean-up in this change, unless you request
otherwise.

     // we need this function in order to do the scroll ourselves.
-    bool wheelEvent(const PlatformWheelEvent&);
+    bool wheelEvent(const PlatformWheelEvent&, bool canRubberbandLeft, bool canRubberbandRight);
 
     bool inProgrammaticScroll() const { return m_inProgrammaticScroll; }
     void setInProgrammaticScroll(bool programmaticScroll) { m_inProgrammaticScroll = programmaticScroll; }