Hide URL from extension pages.
Hide URL from extension pages.

We can't do the same as we do for NTP because NTP is a DOMUI whereas chrome-extensions is just a normal webpage. Adding functionality within TabContents::ShouldDisplayURL() would be sufficient to tell the ombibox not to display the URL.

BUG=12371 (http://crbug.com/12371)
TEST=Tested chrome-extension://id/hello_world.html

Review URL: http://codereview.chromium.org/119406

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@18117 0039d316-1c4b-4281-b951-d872f2087c98

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