Merge 67401 - 210-09-13 Darin Fisher <darin@chromium.org>...

Merge 67401 - 210-09-13  Darin Fisher  <darin@chromium.org>;

        Reviewed by David Levin.

        Add option to conditionally compile smooth scrolling support.
        https://bugs.webkit.org/show_bug.cgi?id=45689

        The OS(WINDOWS) conditional becomes unnecessary since
        ENABLE(SMOOTH_SCROLLING) should only be specified on
        platforms that have a smooth scrolling implementation.

        * platform/ScrollAnimator.cpp:
        * platform/ScrollAnimatorWin.cpp:
        * platform/ScrollAnimatorWin.h:



TBR=darin@chromium.org

Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=67410