GitLab

These const accessors are needed in my other CL 10694055.

The accessors are very simple, so I duplicated the code rather than
const-casting the const accessor to implement the non-const.

BUG=N/A
TEST=N/A (no fix & no new feature)
TBR=jianli@chromium.org,darin@chromium.org,joaodasilva@chromium.org

Review URL: https://chromiumcodereview.appspot.com/10832003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@148906 0039d316-1c4b-4281-b951-d872f2087c98