Don't support iOS in CreateSystemProxyConfigService()

Updated this method since iOS is not supported by Chromoting host.

Review URL: https://codereview.chromium.org/59633005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@236151 0039d316-1c4b-4281-b951-d872f2087c98
[rAc OSX] Animate the dots in the "Loading ..." message.

BUG=315980,315981
TEST=Open Autofill dialog in Wallet mode. While the Wallet data is loading, the
     loading screen should show the message "Loading payment details..." and the
     dots should animate.

R=estade@chromium.org, groby@chromium.org

Review URL: https://codereview.chromium.org/73723002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@236152 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 236152
Remove NOTREACHED from CopyPPVar

In some rare cases, a complex type may be sent via PostMessage to an in-process
plugin. In these cases, we can just return an undefined var because the
intended behaviour is to drop the var anyway. See the associated bug for
details.

BUG=318837

Review URL: https://codereview.chromium.org/75783003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@236153 0039d316-1c4b-4281-b951-d872f2087c98
Some improvements for first-run UI.

"Keep Exploring" button opens help app.
Close button closes dialog.
Added static methods to start and stop tutorial.

BUG=319945, 269286

Review URL: https://codereview.chromium.org/76513002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@236154 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 236154