GitLab

2 parts:
- not all RenderWidgetHosts are RenderViewHosts
- correctly set window/viewport size regardless of order of RenderWidgetFullscreenPepper::OnResize vs RenderWidgetFullscreenPepper::CreateContext

BUG=101848
TEST=Pepper Flash on Youtube, go fullscreen


Review URL: http://codereview.chromium.org/8758017

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@112503 0039d316-1c4b-4281-b951-d872f2087c98