Cleanup deadcode in Rendering

This patch removes the following deadcode in rendering:
RenderMenuList::listBoxSelectItem
HTMLSelectElement::listBoxSelectItem
RenderBlock::pageLogicalTopForOffset
RenderFlowThread::pageLogicalTopForOffset
RenderImage::highQualityRepaintTimerFired
RenderListMarker::suffix
RenderRegion::logicalTopOfFlowThreadContentRect
RenderRegion::logicalBottomOfFlowThreadContentRect
RenderRegion::logicalTopForFlowThreadContent
RenderRegion::logicalBottomForFlowThreadContent

Review URL: https://codereview.chromium.org/442543002

git-svn-id: svn://svn.chromium.org/blink/trunk@179521 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Mark media/video tests as rebaseline/failing for enabling compositing.

We ship composited video to our users but layout tests still turn it
off. These tests fail or need rebaseline when it is turned on.

TBR=ojan@chromium.org, scherkus@chromium.org
BUG=365857, 400829, 400841

Review URL: https://codereview.chromium.org/441043002

git-svn-id: svn://svn.chromium.org/blink/trunk@179522 bbb929c8-8fbe-4397-9dbb-9b2b20218538