GitLab

Set Extension Infobars to have a fixed height determined by the developer (clamped to sane min and max values).

BUG=92656
TEST=This needs to be tested with an Extension, which I can provide.
Review URL: http://codereview.chromium.org/7635019

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@97132 0039d316-1c4b-4281-b951-d872f2087c98