Porting the app launcher to Windows, and adding an experimental flag
so the app launcher shows when you open a new tab.
Also removing the graying-out of the browser when the app launcher is showng for now, as
it is not clear how to make it cross-platform.

BUG=None
TEST=Start Chrome with --app-launcher-new-tab. Opening a new tab
     should bring the app launcher (still a prototype at this point).

Review URL: http://codereview.chromium.org/1145001

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@42280 0039d316-1c4b-4281-b951-d872f2087c98
13 files changed