Enable browser compositor on all TOUCH_UI builds.
Enable browser compositor on all TOUCH_UI builds.

Even Chrome OS builds of chromium.

BUG=none
TEST=build with GYP_DEFINES="chromeos=1 touchui=1 use_ibus=0" on the desktop

Review URL: http://codereview.chromium.org/7396028

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@93001 0039d316-1c4b-4281-b951-d872f2087c98

adobe/chromium,yitian134/chromium,ropik/chromium,yitian134/chromium,adobe/chromium,gavinp/chromium,adobe/chromium,ropik/chromium,adobe/chromium,adobe/chromium,gavinp/chromium,gavinp/chromium,yitian134/chromium,gavinp/chromium,adobe/chromium,yitian134/chromium,yitian134/chromium,ropik/chromium,gavinp/chromium,gavinp/chromium,gavinp/chromium,ropik/chromium,yitian134/chromium,gavinp/chromium,adobe/chromium,adobe/chromium,yitian134/chromium,adobe/chromium,adobe/chromium,yitian134/chromium,gavinp/chromium,yitian134/chromium,ropik/chromium,yitian134/chromium,ropik/chromium,ropik/chromium,gavinp/chromium,ropik/chromium,adobe/chromium,ropik/chromium