Adding more detail to MessageQueue::Dispatch logging.

webrtc/pc/channel.h

Index: webrtc/pc/channel.h
diff --git a/webrtc/pc/channel.h b/webrtc/pc/channel.h
index df75245f276d039b7af827f3470eda152a0c4e18..e2a9fcaa462e58d2acc82e085a9a27350863d0cd 100644
--- a/webrtc/pc/channel.h
+++ b/webrtc/pc/channel.h
@@ -309,7 +309,7 @@ class BaseChannel
   // Helper function for invoking bool-returning methods on the worker thread.
   template <class FunctorT>
   bool InvokeOnWorker(const FunctorT& functor) {
-    return worker_thread_->Invoke<bool>(functor);
+    return worker_thread_->Invoke<bool>(FROM_HERE, functor);
   }
 
  private: