Fix bustage

ipc/glue/AsyncChannel.cpp

@@ -41,6 +41,7 @@
 #include "mozilla/ipc/GeckoThread.h"
 
 #include "nsDebug.h"
+#include "nsTraceRefcnt.h"
 #include "nsXULAppAPI.h"
 
 using mozilla::MutexAutoLock;

ipc/glue/RPCChannel.cpp

@@ -41,6 +41,7 @@
 #include "mozilla/ipc/GeckoThread.h"
 
 #include "nsDebug.h"
+#include "nsTraceRefcnt.h"
 
 #define RPC_ASSERT(_cond, ...)                                      \
     do {                                                            \

ipc/glue/SyncChannel.cpp

@@ -41,6 +41,7 @@
 #include "mozilla/ipc/GeckoThread.h"
 
 #include "nsDebug.h"
+#include "nsTraceRefcnt.h"
 
 #ifdef OS_WIN
 #include "nsServiceManagerUtils.h"