Attempt 2 at fixing white flash in switching between ntp and non-ntp.
Attempt 2 at fixing white flash in switching between ntp and non-ntp.

BUG=27898
TEST=make sure tab switching on chrome os doesn't result in any visual
artifacts, especially when switching between ntp and non-ntp.

Review URL: http://codereview.chromium.org/404005

git-svn-id: dd90618784b6a4b323ea0c23a071cb1c9e6f2ac7@32189 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