Add a test for password infobar.
Add a test for password infobar.

The test verifies that the password infobar displays
when cookies are blocked for Google account domains.

TEST=none
BUG=none
Review URL: https://chromiumcodereview.appspot.com/10139007

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@133101 0039d316-1c4b-4281-b951-d872f2087c98

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