Revert 63651 (turned chromeos red, http://build.chromium.org/buildbot/waterfall/builders/Linux%20Builder%20(ChromiumOS%20dbg)/builds/1895/steps/ui_tests/logs/LoadOptionsByURL )- Add LeakTracker<URLRequestContext> to IOThread::CleanUp().
Revert 63651 (turned chromeos red, http://build.chromium.org/buildbot/waterfall/builders/Linux%20Builder%20(ChromiumOS%20dbg)/builds/1895/steps/ui_tests/logs/LoadOptionsByURL )- Add LeakTracker<URLRequestContext> to IOThread::CleanUp().

Move LeakTracker<URLRequest> up to CleanUp also.  No URLRequest should be getting killed in DestructionObservers anymore.

BUG=59630
TEST=existing

Review URL: http://codereview.chromium.org/4064004

TBR=willchan@chromium.org
Review URL: http://codereview.chromium.org/4069002

git-svn-id: dd90618784b6a4b323ea0c23a071cb1c9e6f2ac7@63731 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser