GitLab

Fixup after "Gamepad: don't notify about connected pads twice".
The CHECK(!g_gamepad_service) I added is failing because during
unit tests several instance can be created and destroyed.

R=bajones@chromium.org
BUG=391503

Review URL: https://codereview.chromium.org/372053004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@281959 0039d316-1c4b-4281-b951-d872f2087c98