Upgrade overview to a single monitor cycle mode on window cycling.

BUG=276516
TEST=WindowSelectorTest.OverviewTransitionToCycle, WindowSelectorTest.MultipleDisplaysOverviewTransitionToCycle
TEST=With overview mode enabled, enter overview with window selector button (F5) and then start alt tabbing to switch windows.

Review URL: https://codereview.chromium.org/24265012

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@225369 0039d316-1c4b-4281-b951-d872f2087c98
Fix grammar for the privet notifications checkbox on chrome settings dialog

Change incorrect verb conjugation in the label for the privet notifications
checkboxin the chrome settings dialog.

BUG=297803

Review URL: https://codereview.chromium.org/24265013

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@225370 0039d316-1c4b-4281-b951-d872f2087c98
Observe focused window before removing focus.

BUG=297582
TEST=Open a youtube video, fullscreen it, and then press alt+tab. Chrome should not crash.

Review URL: https://codereview.chromium.org/24267025

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@225371 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 225370
[MediaGalleries] Add UMAs for tracking API usage, dialog usage, webui usage.

R=vandebo@chromium.org
BUG=281497

Review URL: https://codereview.chromium.org/24272006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@225372 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 225371
SVN changes up to revision 225372