Use IOThread::Globals where possible in ChromeURLRequestContext
Use IOThread::Globals where possible in ChromeURLRequestContext

BUG=70560
TEST=none

Review URL: http://codereview.chromium.org/6379005

git-svn-id: http://src.chromium.org/svn/trunk/src@72605 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: c8ae7c9d25b07bdec927640815c4d6965772779b
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