Parse createUrl field of apps.list Drive API.

This CL just parses and stores the field for future use.

BUG=324165

Review URL: https://codereview.chromium.org/125553004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@243335 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 243335