Reviewed by Darin.

    Reviewed by Darin.

        - fix http://bugs.webkit.org/show_bug.cgi?id=10747
        REGRESSION: Using two fingers on a trackpad to scroll inside a text area makes the whole page move
        <rdar://problem/5045710>

        Eat smooth scroll events in WebCore if pointer is over scrollable area. Not
        really a good fix, smooth scrolling should be supported properly. It should do for now.

        * page/EventHandler.cpp:
        (WebCore::EventHandler::handleWheelEvent):
        * rendering/RenderListBox.cpp:
        (WebCore::RenderListBox::isScrollable):
        * rendering/RenderListBox.h:
        * rendering/RenderObject.cpp:
        (WebCore::RenderObject::isScrollable):
        * rendering/RenderObject.h:
        * rendering/RenderTextControl.cpp:
        (WebCore::RenderTextControl::isScrollable):
        * rendering/RenderTextControl.h:

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@20349 268f45cc-cd09-0410-ab3c-d52691b4dbfc