Adds missing USB events to the imageWriterPrivate API definition.

BUG=308191

Review URL: https://codereview.chromium.org/27563002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@233421 0039d316-1c4b-4281-b951-d872f2087c98
Defer app window appearance until first paint.

In order to avoid an ugly flash of white pixels when a new app window is
shown, this patch defers showing a window until a non-empty backing
store update has completed.

The feature is behind the "enable-apps-show-on-first-paint" flag.

BUG=225843, 254152

Review URL: https://codereview.chromium.org/55293003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@233422 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 233421
Disable network speech on Chrome OS temporarily.

BUG=314799
NOTRY=true

Review URL: https://codereview.chromium.org/55293006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@233423 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 233422
Enable account reconcilor when --new-profile-management is used.
Move mergesession from SigninManager to reconcilor.
Implement ListAccounts.
Start implementing reconcile action, but still a noop for now.

This CL depends on https://codereview.chromium.org/57103002/

Alan: here is an implementation of the ListAccounts.  I also added lots of
DVLOG() to the code.  Let me know if you'd rather I took those out and put
in a separate CL.

Hui: please review.  This CL adds more functionality to the reconcilor but
its still not complete.  However, it enables AC behind the flag for merge
session so you don't need to do that manually.

BUG=305249

Review URL: https://codereview.chromium.org/57363003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@233424 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 233424