Fix invalidates from off-screen plugins on the Mac.
Fix invalidates from off-screen plugins on the Mac.

BUG=20234
TEST=Flash plugins that start offscreen should look correct when scrolled into view.

Review URL: http://codereview.chromium.org/173552

git-svn-id: dd90618784b6a4b323ea0c23a071cb1c9e6f2ac7@24621 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser