2011-01-21 Tony Chang <tony@chromium.org>

2011-01-21  Tony Chang  <tony@chromium.org>

        Reviewed by Sam Weinig.

        reduce number of FrameLoaderClient::didChangeScrollOffset calls
        https://bugs.webkit.org/show_bug.cgi?id=52915

        Only notify of changes in scroll offset when there actually is a change.
        This regressed in r76291.

        Covered by Chromium browser_tests.

        * platform/ScrollAnimator.cpp:
        (WebCore::ScrollAnimator::scrollToOffsetWithoutAnimation):

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@76395 268f45cc-cd09-0410-ab3c-d52691b4dbfc