Merge 89584 - 2011-06-23 John Abd-El-Malek <jam@chromium.org>

Merge 89584 - 2011-06-23  John Abd-El-Malek  <jam@chromium.org>;

        Reviewed by Tony Chang.

        [chromium] Fix WebScrollBarImpl on Mac after recent smooth scrolling changes
        https://bugs.webkit.org/show_bug.cgi?id=63260

        * src/WebScrollbarImpl.cpp:
        (WebKit::WebScrollbarImpl::visibleHeight):
        (WebKit::WebScrollbarImpl::visibleWidth):
        (WebKit::WebScrollbarImpl::contentsSize):
        (WebKit::WebScrollbarImpl::overhangAmount):
        * src/WebScrollbarImpl.h:


TBR=jam@chromium.org
Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=89586