Fix a crash in incognito mode when clicking the wrench menu.
Fix a crash in incognito mode when clicking the wrench menu.

This was a regression recent sync UI changes.  This fixes the regression to match the old incognito mode behavior.

TBR=tim@chromium.org
BUG=25014
TEST=See bug.  It doesn't crash anymore.

Review URL: http://codereview.chromium.org/283008

git-svn-id: http://src.chromium.org/svn/trunk/src@29257 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: eb9ed68ccc67960641365b4b901d8c46e5b6904f
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