Adding more detail to MessageQueue::Dispatch logging.

webrtc/api/java/jni/peerconnection_jni.cc

Index: webrtc/api/java/jni/peerconnection_jni.cc
diff --git a/webrtc/api/java/jni/peerconnection_jni.cc b/webrtc/api/java/jni/peerconnection_jni.cc
index ac328efc2b13d2e15c6a22878ba62cea11aebcc9..28aec9748d870168b0b9d5f2c0792a8901fb08d3 100644
--- a/webrtc/api/java/jni/peerconnection_jni.cc
+++ b/webrtc/api/java/jni/peerconnection_jni.cc
@@ -1100,8 +1100,10 @@ void OwnedFactoryAndThreads::JavaCallbackOnFactoryThreads() {
 void OwnedFactoryAndThreads::InvokeJavaCallbacksOnFactoryThreads() {
   LOG(LS_INFO) << "InvokeJavaCallbacksOnFactoryThreads.";
   worker_thread_->Invoke<void>(
+      FROM_HERE,
       Bind(&OwnedFactoryAndThreads::JavaCallbackOnFactoryThreads, this));
   signaling_thread_->Invoke<void>(
+      FROM_HERE,
       Bind(&OwnedFactoryAndThreads::JavaCallbackOnFactoryThreads, this));
 }