Fix destruction ordering for ChromeURLRequestGetter.
Fix destruction ordering for ChromeURLRequestGetter.

BUG=none
TEST=none

Review URL: http://codereview.chromium.org/6246112

git-svn-id: http://src.chromium.org/svn/trunk/src@73835 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: bcd2730e3fb48bd00527bf5443b7148bf1931642
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