Make browser_tests obey BROWSER_WRAPPER, like how ui_tests do.
Make browser_tests obey BROWSER_WRAPPER, like how ui_tests do.

Review URL: http://codereview.chromium.org/4632002

git-svn-id: http://src.chromium.org/svn/trunk/src@65602 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 1447473b0d9d33decc58851d66af0220f96fc2d7
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