BUG=6885 TEST=inspect mm-modem.h, build cromo et al against new mm-modem.h Change-Id: Id8c849b6cffbadb9d5d2aa4109257eb747cf9bb5 Review URL: http://codereview.chromium.org/3616004 (cherry picked from commit 3a50b8c28d155060ce035a1c6d5eadf3d91297a5)