drive: Rename kDriveGrandRoot(OtherDir)SpecialResourceId to LocalId

These values are only used locally.

BUG=None
TEST=build
R=kinaba@chromium.org

Review URL: https://codereview.chromium.org/64043002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@233773 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 233773