Adapt a function in ProfileSyncServiceMock to again match the parent class's signature.
Adapt a function in ProfileSyncServiceMock to again match the parent class's signature.

BUG=72154
TEST=none

Review URL: http://codereview.chromium.org/6480026

git-svn-id: http://src.chromium.org/svn/trunk/src@74436 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 33b99493bd8b1a3fb8258fcc5909a46227130463
meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser