GitLab

This is a preliminary work for moving web dialog stuffs to ui/web_dialogs.

BUG=125841
TEST=rowser_tests --gtest_filter="CertificateViewerUITest*.*" passes


Review URL: https://chromiumcodereview.appspot.com/10332231

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@137979 0039d316-1c4b-4281-b951-d872f2087c98