Adding two test cases to the existing webrtc content_browser tests:
1) Verify that setLocalDescription fails when trying to negotiate an unsupported video codec
 
- Verify that setLocalDescription fails when trying to negotiate with a client that does not support encryption
 

BUG=303035

Review URL: https://codereview.chromium.org/47923023

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@235798 0039d316-1c4b-4281-b951-d872f2087c98
Initialize DomDistillerStore

Needed as part of setting up the DomDistillerBrowserContextKeyedService.
Distilled articles will be stored in an "Articles" directory in the
user's profile directory.
BUG=288015

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=235562

NOTRY=true

Review URL: https://codereview.chromium.org/63553009

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@235799 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 235799