Made MessagePump a non-thread safe class.

base/message_loop/message_pump.h

Index: base/message_loop/message_pump.h
diff --git a/base/message_loop/message_pump.h b/base/message_loop/message_pump.h
index 5b722321495240db85ba80a943a1b7b0efe5c332..0ebba3a3e60ccfd07abb2808e2632a254a76747c 100644
--- a/base/message_loop/message_pump.h
+++ b/base/message_loop/message_pump.h
@@ -6,13 +6,13 @@
 #define BASE_MESSAGE_LOOP_MESSAGE_PUMP_H_
 
 #include "base/base_export.h"
-#include "base/memory/ref_counted.h"
+#include "base/threading/non_thread_safe.h"
 
 namespace base {
 
 class TimeTicks;
 
-class BASE_EXPORT MessagePump : public RefCountedThreadSafe<MessagePump> {
+class BASE_EXPORT MessagePump : public NonThreadSafe {
  public:
   // Please see the comments above the Run method for an illustration of how
   // these delegate methods are used.
@@ -42,6 +42,7 @@ class BASE_EXPORT MessagePump : public RefCountedThreadSafe<MessagePump> {
   };
 
   MessagePump();
+  virtual ~MessagePump();
 
   // The Run method is called to enter the message pump's run loop.
   //
@@ -118,10 +119,6 @@ class BASE_EXPORT MessagePump : public RefCountedThreadSafe<MessagePump> {
   // cancelling any pending DoDelayedWork callback.  This method may only be
   // used on the thread that called Run.
   virtual void ScheduleDelayedWork(const TimeTicks& delayed_work_time) = 0;
-
- protected:
-  virtual ~MessagePump();
-  friend class RefCountedThreadSafe<MessagePump>;
 };
 
 }  // namespace base