[rAC, OSX] Show account chooser at right width.

Entries in autofill account chooser were occasionally cut of, due to
not re-layouting the account chooser when its frame changed.

BUG=308173
R=isherman@chromium.org

Review URL: https://codereview.chromium.org/27564003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@229365 0039d316-1c4b-4281-b951-d872f2087c98
Don't load wallpaper picker extension for guest session

BUG=307593

Review URL: https://codereview.chromium.org/27564004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@229366 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 229366
TSAN: Disable more TraceEventTestFixture tests that may deadlock.

BUG=308273
TBR=wangxianzhu@chromium.org
NOTRY=true

Review URL: https://codereview.chromium.org/27788002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@229367 0039d316-1c4b-4281-b951-d872f2087c98
SignedInDevices Extensions API - Change the permission text to be more descriptive and accurately reflect the intended usage

BUG=284177

Review URL: https://codereview.chromium.org/27568002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@229368 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 229368