GitLab

Change the return type of Remove() to bool, and add a size_t output parameter.

BUG=None
TEST=None

R=evan@chromium.org

Review URL: http://codereview.chromium.org/7618021

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@96702 0039d316-1c4b-4281-b951-d872f2087c98