Fix a regression with chrome.tabs.create() with a chrome-extension URL when only an incognito window was visible.
Fix a regression with chrome.tabs.create() with a chrome-extension URL when
only an incognito window was visible.

BUG=41087

Review URL: http://codereview.chromium.org/2881004

git-svn-id: http://src.chromium.org/svn/trunk/src@51283 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 39106ecf6714b1c53ecf31329764f5cebfa397f1
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