Adding more detail to MessageQueue::Dispatch logging.

webrtc/base/thread.h

Index: webrtc/base/thread.h
diff --git a/webrtc/base/thread.h b/webrtc/base/thread.h
index 1afe9d5ebef17aca78fb460a3d5df012a61bcaa5..97e69415cd3dba6098c022edfd7968a705c7c357 100644
--- a/webrtc/base/thread.h
+++ b/webrtc/base/thread.h
@@ -151,7 +151,8 @@ class LOCKABLE Thread : public MessageQueue {
   // ProcessMessages occasionally.
   virtual void Run();
 
-  virtual void Send(MessageHandler* phandler,
+  virtual void Send(const Location& posted_from,
+                    MessageHandler* phandler,
                     uint32_t id = 0,
                     MessageData* pdata = NULL);
 
@@ -159,15 +160,14 @@ class LOCKABLE Thread : public MessageQueue {
   // provide the |ReturnT| template argument, which cannot (easily) be deduced.
   // Uses Send() internally, which blocks the current thread until execution
   // is complete.
-  // Ex: bool result = thread.Invoke<bool>(&MyFunctionReturningBool);
+  // Ex: bool result = thread.Invoke<bool>(RTC_FROM_HERE,
+  // &MyFunctionReturningBool);
   // NOTE: This function can only be called when synchronous calls are allowed.
   // See ScopedDisallowBlockingCalls for details.
   template <class ReturnT, class FunctorT>
-  ReturnT Invoke(const FunctorT& functor) {
-    InvokeBegin();
+  ReturnT Invoke(const Location& posted_from, const FunctorT& functor) {
     FunctorMessageHandler<ReturnT, FunctorT> handler(functor);
-    Send(&handler);
-    InvokeEnd();
+    InvokeInternal(posted_from, &handler);
     return handler.result();
   }
 
@@ -261,9 +261,7 @@ class LOCKABLE Thread : public MessageQueue {
   // Returns true if there is such a message.
   bool PopSendMessageFromThread(const Thread* source, _SendMessage* msg);
 
-  // Used for tracking performance of Invoke calls.
-  void InvokeBegin();
-  void InvokeEnd();
+  void InvokeInternal(const Location& posted_from, MessageHandler* handler);
 
   std::list<_SendMessage> sendlist_;
   std::string name_;