Blink roll 168640:168654

http://build.chromium.org/f/chromium/perf/dashboard/ui/changelog_blink.html?url=/trunk&range=168641:168654&mode=html
TBR=
BUG=

Review URL: https://codereview.chromium.org/183803031

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@255414 0039d316-1c4b-4281-b951-d872f2087c98
Update .DEPS.git

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@255415 0039d316-1c4b-4281-b951-d872f2087c98
aura: Remove client::UserActionClient.

UserActionClient is used to navigate back/forward when the back/forward on a
supported mouse-device is clicked on X11. This can instead be achieved by
installing an event-handler on the browser window.

This does change the behaviour a little on ChromeOS: clicking these navigation
buttons when the cursor is not on top of the browser window will not navigate
after this change. I have confirmed with UX that this is a desirable change.

BUG=319636
R=sky@chromium.org

Previously landed in r255385, reverted in r255398 to allow another revert in r255399.

Review URL: https://codereview.chromium.org/183853037

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@255416 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 255415
SVN changes up to revision 255416