Made MessagePump a non-thread safe class.

base/message_loop/message_pump_libevent_unittest.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/message_loop/message_pump_libevent.h"
 
 #include <unistd.h>
 
 #include "base/message_loop/message_loop.h"
 #include "base/posix/eintr_wrapper.h"
@@ skipping 104 matching lines @@
   }
 
   virtual void OnFileCanWriteWithoutBlocking(int /* fd */) OVERRIDE {
     DCHECK(controller_);
     delete controller_;
     controller_ = NULL;
   }
 };
 
 TEST_F(MessagePumpLibeventTest, DeleteWatcher) {
-  scoped_refptr<MessagePumpLibevent> pump(new MessagePumpLibevent);
+  scoped_ptr<MessagePumpLibevent> pump(new MessagePumpLibevent);
   MessagePumpLibevent::FileDescriptorWatcher* watcher =
       new MessagePumpLibevent::FileDescriptorWatcher;
   DeleteWatcher delegate(watcher);
   pump->WatchFileDescriptor(pipefds_[1],
       false, MessagePumpLibevent::WATCH_READ_WRITE, watcher, &delegate);
 
   // Spoof a libevent notification.
   OnLibeventNotification(pump.get(), watcher);
 }
 
 class StopWatcher : public BaseWatcher {
  public:
   explicit StopWatcher(
       MessagePumpLibevent::FileDescriptorWatcher* controller)
       : BaseWatcher(controller) {}
 
   virtual ~StopWatcher() {}
 
   virtual void OnFileCanWriteWithoutBlocking(int /* fd */) OVERRIDE {
     controller_->StopWatchingFileDescriptor();
   }
 };
 
 TEST_F(MessagePumpLibeventTest, StopWatcher) {
-  scoped_refptr<MessagePumpLibevent> pump(new MessagePumpLibevent);
+  scoped_ptr<MessagePumpLibevent> pump(new MessagePumpLibevent);
   MessagePumpLibevent::FileDescriptorWatcher watcher;
   StopWatcher delegate(&watcher);
   pump->WatchFileDescriptor(pipefds_[1],
       false, MessagePumpLibevent::WATCH_READ_WRITE, &watcher, &delegate);
 
   // Spoof a libevent notification.
   OnLibeventNotification(pump.get(), &watcher);
 }
 
 }  // namespace
 
 }  // namespace base