On Chrome for Android, the select popup is rendered in Java and so we have to specify that select popups are external.
On Chrome for Android, the select popup is rendered in Java and so we have to
specify that select popups are external.

BUG=None
TEST=Select popup should work in Chrome for Android.


Review URL: http://codereview.chromium.org/9405025

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@122217 0039d316-1c4b-4281-b951-d872f2087c98

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