Added app hashes for private API access.

BUG=293683
TEST=none

Review URL: https://chromiumcodereview.appspot.com/24078023

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@224677 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 224677