Add IsInternal property to gfx::Display

Move knowledge whether a display is internal or not
from ash::DisplayManager into gfx::Display.

BUG=171310
TEST=ash_unittests, ui_unittests, unit_tests pass


Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=182494

Review URL: https://chromiumcodereview.appspot.com/12217120

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@183230 0039d316-1c4b-4281-b951-d872f2087c98
10 files changed