[Ozone] SoftwareSurfaceOzone unittests

See https://codereview.chromium.org/26866006/ for implementation.

BUG=

Review URL: https://codereview.chromium.org/26179005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@229136 0039d316-1c4b-4281-b951-d872f2087c98
<webview>: Fix crash when navigating to invalid chrome-extension: URL

BUG=308119
Test=Open Browser app demo, navigation to an invalid chrome-extension: URL such as chrome-extension://abc123/guest.html. Chrome should not crash.

Review URL: https://codereview.chromium.org/26332006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@229137 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 229136
Adding UI to configure whether commands are global or not.

Previously reviewed here:
https://codereview.chromium.org/25746002/

BUG=302437
TBR=yoz

Review URL: https://codereview.chromium.org/27691002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@229138 0039d316-1c4b-4281-b951-d872f2087c98
Removed --disable-cloud-policy-on-signin flag.

Also removed the related kDisableCloudPolicyOnSignin pref.

BUG=None

Review URL: https://codereview.chromium.org/26512003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@229139 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 229139