DO NOT SUBMIT. Hacky trace event data for MessagePumpMac.

base/message_loop/message_pump_mac.h

Index: base/message_loop/message_pump_mac.h
diff --git a/base/message_loop/message_pump_mac.h b/base/message_loop/message_pump_mac.h
index 748b26591f0403baaaa88fc9ad070135c8565f3b..1ea3ffd170cada21293b89c47bcc60400d55abad 100644
--- a/base/message_loop/message_pump_mac.h
+++ b/base/message_loop/message_pump_mac.h
@@ -32,9 +32,10 @@
 
 #include "base/message_loop/message_pump.h"
 
-#include "base/basictypes.h"
-
 #include <CoreFoundation/CoreFoundation.h>
+#include <stack>
+
+#include "base/basictypes.h"
 
 #if !defined(__OBJC__)
 class NSAutoreleasePool;
@@ -178,6 +179,8 @@ class MessagePumpCFRunLoopBase : public MessagePump {
   // the object was created in.
   int nesting_level_;
 
+  std::stack<uint32> nesting_stack_;
+
   // The recursion depth (calculated in the same way as nesting_level_) of the
   // innermost executing CFRunLoopRun loop started by a call to Run.
   int run_nesting_level_;