This cl removes the unused MediaStreamManager::Error function as well as making sure
a request is only completed on MediaStreamManager::Opened if the request state is in the expected state.
Furthermore it adds information about the number of requests and loops in MediaStreamManager::CancelAllRequests.
This is to help debug 316396 and 317534.
BUG= 316396,317534
R=joi@chromium.org, wjia@chromium.org, xians@chromium.org
Review URL: https://codereview.chromium.org/
67823002
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@234445 0039d316-1c4b-4281-b951-d872f2087c98