Hide scrollbars in overscroll tests.

The overscroll tests in WebContentsViewAuraTest are currently relying
on broken behaviour in the scrollbar. Some touches in the test are
originating over the scrollbars. Scrollbars shouldn't have any impact
on these tests, so we should hide them.

This was the cause of failures due to this patch:
https://codereview.chromium.org/102663003/

TEST=WebContentsViewAuraTest.*

Review URL: https://codereview.chromium.org/110403002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@239704 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 239704
[rac] Temporarily copy libaddressinput to Chrome.

This patch copies libaddressinput to Chrome to enable local development of
the library. After Chrome-specific changes are in, we will upstream the
library back to https://libaddressinput.googlecode.com.

BUG=327046

Review URL: https://codereview.chromium.org/110533002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@239705 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 239705
Removed logic for sync setup via LoginUtils.

This step isn't needed anymore, should have us one call to GAIA where we were fetching SID/LSID with OAuthLogin access token.

BUG=308318
TEST=none

Review URL: https://codereview.chromium.org/108853002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@239706 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 239706