Remove DEPS restrictions on //chrome/browser/signin.

Componentization of this code is not actively being pursued at the
moment, and these are getting in the way of some ongoing work.

BUG=233552
NOTRY=true

Review URL: https://codereview.chromium.org/34803003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@230133 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 230133
[iOS] Make it possible to scroll history page while keyboard is visible.

BUG=292715
TEST=See repro steps in bug.
R=sergiu@chromium.org

Review URL: https://codereview.chromium.org/31393005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@230134 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 230134