Selectively disable rubber banding on mac.

Source/web/PageWidgetDelegate.cpp

Index: Source/web/PageWidgetDelegate.cpp
diff --git a/Source/web/PageWidgetDelegate.cpp b/Source/web/PageWidgetDelegate.cpp
index 0c7ab2aa17c25b0a0554f833e9f302d36b74568d..6cb66ae413792b2483997aa5041f1655d879bb53 100644
--- a/Source/web/PageWidgetDelegate.cpp
+++ b/Source/web/PageWidgetDelegate.cpp
@@ -107,7 +107,7 @@ void PageWidgetDelegate::paint(Page* page, PageOverlayList* overlays, WebCanvas*
     gc.restore();
 }
 
-bool PageWidgetDelegate::handleInputEvent(Page* page, PageWidgetEventHandler& handler, const WebInputEvent& event)
+bool PageWidgetDelegate::handleInputEvent(Page* page, PageWidgetEventHandler& handler, const WebInputEvent& event, bool canRubberbandLeft, bool canRubberbandRight)
 {
     LocalFrame* frame = page ? page->mainFrame() : 0;
     switch (event.type) {
@@ -139,7 +139,7 @@ bool PageWidgetDelegate::handleInputEvent(Page* page, PageWidgetEventHandler& ha
     case WebInputEvent::MouseWheel:
         if (!frame || !frame->view())
             return false;
-        return handler.handleMouseWheel(*frame, *static_cast<const WebMouseWheelEvent*>(&event));
+        return handler.handleMouseWheel(*frame, *static_cast<const WebMouseWheelEvent*>(&event), canRubberbandLeft, canRubberbandRight);
 
     case WebInputEvent::RawKeyDown:
     case WebInputEvent::KeyDown:
@@ -209,9 +209,9 @@ void PageWidgetEventHandler::handleMouseUp(LocalFrame& mainFrame, const WebMouse
     mainFrame.eventHandler().handleMouseReleaseEvent(PlatformMouseEventBuilder(mainFrame.view(), event));
 }
 
-bool PageWidgetEventHandler::handleMouseWheel(LocalFrame& mainFrame, const WebMouseWheelEvent& event)
+bool PageWidgetEventHandler::handleMouseWheel(LocalFrame& mainFrame, const WebMouseWheelEvent& event, bool canRubberbandLeft, bool canRubberbandRight)
 {
-    return mainFrame.eventHandler().handleWheelEvent(PlatformWheelEventBuilder(mainFrame.view(), event));
+    return mainFrame.eventHandler().handleWheelEvent(PlatformWheelEventBuilder(mainFrame.view(), event), canRubberbandLeft, canRubberbandRight);
 }
 
 bool PageWidgetEventHandler::handleTouchEvent(LocalFrame& mainFrame, const WebTouchEvent& event)