[wk2] Un-pollute TCADA methods with "PageOverlayLayerMap::iterator end"
https://bugs.webkit.org/show_bug.cgi?id=114387

Reviewed by Simon Fraser.

* WebProcess/WebPage/mac/TiledCoreAnimationDrawingArea.mm:
(WebKit::TiledCoreAnimationDrawingArea::updatePreferences):
(WebKit::TiledCoreAnimationDrawingArea::paintContents):
(WebKit::TiledCoreAnimationDrawingArea::flushLayers):
(WebKit::TiledCoreAnimationDrawingArea::setExposedRect):
(WebKit::TiledCoreAnimationDrawingArea::mainFrameScrollabilityChanged):
(WebKit::TiledCoreAnimationDrawingArea::updateGeometry):
(WebKit::TiledCoreAnimationDrawingArea::setRootCompositingLayer):


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@148143 268f45cc-cd09-0410-ab3c-d52691b4dbfc