Suppress a leak that valgrind claims is in RuleSet::ensurePendingRules.

BUG=340957
NOTRY=true
TBR=abarth@chromium.org

Review URL: https://codereview.chromium.org/148353004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@248943 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 248943
Made AppRTC and Firefox interop test verify video as well.

Also, Chrome will now run with fake devices in all AppRTC tests. It
seemed to acquire the camera now, which would make the firefox test
fail. Presumably it looks at the fake device flag at a later stage now
(or we have just been lucky so far), so set the flag earlier to ensure
Firefox can reliably acquire the cam on the system. Running with fake
devices in this test is fine anyway, its primary purpose is not to
check that the capture path works.

Context: https://code.google.com/p/webrtc/issues/detail?id=2858.

BUG=272077
NOTRY=True

Review URL: https://codereview.chromium.org/146693010

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@248944 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 248944