Do not enable the home button by default on new installs.  This doesn't affect the default home page.
Do not enable the home button by default on new installs.  This doesn't affect the default home page.

BUG=27570
TEST=A new install of Chrome should not have a home button on first run.
Review URL: http://codereview.chromium.org/1519023

git-svn-id: http://src.chromium.org/svn/trunk/src@43788 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: bdb94379c9f840e7c025496f14322690e73bffc0
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