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Review URL: https://codereview.chromium.org/147393004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@249283 0039d316-1c4b-4281-b951-d872f2087c98
Fix: Files.app doesn't start because Google Drive folder root entry is not found.

BUG=341305
R=hirono@chromium.org

Review URL: https://codereview.chromium.org/156403002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@249284 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 249284