Cast: Cleanup dead code related to handling incoming RTCP messages.

Code related to handling various RTCP messages that we should ignore
is removed by this CL.

Review URL: https://codereview.chromium.org/62933002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@233818 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 233818
Make generated card animation prettier in HIDPI.

R=groby@chromium.org,estade@chromium.org
BUG=310847
TEST=visual

Review URL: https://codereview.chromium.org/62953010

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@233819 0039d316-1c4b-4281-b951-d872f2087c98
Add FindItemindex, RemoveItem, RemoveItemAt and InsertItemAt apis to AppListItemList.

BUG=314701

Review URL: https://codereview.chromium.org/63123003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@233820 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 233820