GitLab

        Reviewed by Dan Bernstein.

        Don't paint more than 60 times per second
        https://bugs.webkit.org/show_bug.cgi?id=56206
        <rdar://problem/9085989>

        * WebProcess/WebPage/DrawingAreaImpl.cpp:
        (WebKit::DrawingAreaImpl::DrawingAreaImpl):
        Initialize m_lastDisplayTime to 0. Change the display timer to call displayTimerFired.

        (WebKit::DrawingAreaImpl::didUpdate):
        Call displayTimerFired instead of display.

        (WebKit::DrawingAreaImpl::displayTimerFired):
        If we're asked to paint again less than 1/60th of a second after we've already painted,
        defer painting.

        (WebKit::DrawingAreaImpl::display):
        Update m_lastDisplayTime.


git-svn-id: svn://svn.chromium.org/blink/trunk@80875 bbb929c8-8fbe-4397-9dbb-9b2b20218538