Adding more detail to MessageQueue::Dispatch logging.

webrtc/base/thread.cc

Index: webrtc/base/thread.cc
diff --git a/webrtc/base/thread.cc b/webrtc/base/thread.cc
index 3971169ae7d21eba89e9a6512556a337daa1a9ec..addbf60b0e6ce142fc0ed343eda372f2fddcb753 100644
--- a/webrtc/base/thread.cc
+++ b/webrtc/base/thread.cc
@@ -343,7 +343,10 @@ void Thread::Stop() {
   Join();
 }
 
-void Thread::Send(MessageHandler* phandler, uint32_t id, MessageData* pdata) {
+void Thread::Send(const Location& posted_from,
+                  MessageHandler* phandler,
+                  uint32_t id,
+                  MessageData* pdata) {
   if (fStop_)
     return;
 
@@ -351,6 +354,7 @@ void Thread::Send(MessageHandler* phandler, uint32_t id, MessageData* pdata) {
   // of "thread", like Win32 SendMessage. If in the right context,
   // call the handler directly.
   Message msg;
+  msg.posted_from = posted_from;
   msg.phandler = phandler;
   msg.message_id = id;
   msg.pdata = pdata;