linux_aura: Flip the close button when it is the leftmost button.

The linux close button assets are designed to be flipped when they're on
the left side of the screen. They were not being flipped properly.

BUG=281788

Review URL: https://codereview.chromium.org/24855003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@226121 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 226121
Fix a bug that FocusOutlineManager.visible doesn't return a value.

We should return a value.

BUG=283692

Review URL: https://codereview.chromium.org/25014007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@226122 0039d316-1c4b-4281-b951-d872f2087c98
Use production Wallet service URL by default.

Also change --wallet-service-use-prod to --wallet-service-use-sandbox instead
(and update about:flags description).

BUG=299902
R=estade@chromium.org
TEST=unit_tests, no developer warning/real generated cards by default

Review URL: https://codereview.chromium.org/25127002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@226123 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 226123