Make MessageLoop::MessageLoop easier to read.
Make MessageLoop::MessageLoop easier to read.

BUG=none
TEST=none
Review URL: http://codereview.chromium.org/1655007

git-svn-id: http://src.chromium.org/svn/trunk/src@44595 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 0d4b0f08a9ca458e3b0afc29c5a1b3c2d80418a1
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