The window title/background is currently set only when the activity is
updated after the window is created. But if the activity is already
loaded by the time it is added, or if the activity is never loaded (e.g.
because of unavailable network), then the activity is never updates,
and consequently athena ends up showing a transparent window title. So
set the title once upon creation.
BUG=398937
R=oshima@chromium.org
Review URL: https://codereview.chromium.org/433083003
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@287074 0039d316-1c4b-4281-b951-d872f2087c98
07ee26143f