Fix crash that happens when the damaged rect is bigger than the HDC we get for painting a windowless plugin.
Fix crash that happens when the damaged rect is bigger than the HDC we get for painting a windowless plugin.

BUG=6317
Review URL: http://codereview.chromium.org/28242

git-svn-id: http://src.chromium.org/svn/trunk/src@10571 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 61480b8daf7a7cb337f1fc682ffe1672de5b88e4
meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser