Remove Thread::RunningForChannelManager().

I haven't heard of this failing, so it should be safe to remove. Let me know if this isn't the case.

BUG=3388
R=andrew@webrtc.org, wu@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/18659004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@6695 4adac7df-926f-26a2-2b94-8c16560cd09d

webrtc/base/thread.h

@@ -218,11 +218,6 @@ class Thread : public MessageQueue {
   // question to guarantee that the returned value remains true for the duration
   // of whatever code is conditionally executing because of the return value!
   bool RunningForTest() { return running(); }
-  // This is a legacy call-site that probably doesn't need to exist in the first
-  // place.
-  // TODO(fischman): delete once the ASSERT added in channelmanager.cc sticks
-  // for a month (ETA 2014/06/22).
-  bool RunningForChannelManager() { return running(); }
 
  protected:
   // Blocks the calling thread until this thread has terminated.