Force the font color to black on confirm info bars.
Force the font color to black on confirm info bars.

We were already doing this with other info bars, this one just
slipped through the cracks.

BUG=58371
TEST=Install a dark theme and navigate to http://html5demos.com/geo .  The
  text in the info bar should be readable.

Review URL: http://codereview.chromium.org/3629004

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@62036 0039d316-1c4b-4281-b951-d872f2087c98

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