RefCounted types should not have public destructors, Linux fixes

base/message_pump_x.h

 // 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.
 
 #ifndef BASE_MESSAGE_PUMP_X_H
 #define BASE_MESSAGE_PUMP_X_H
 
 #include "base/memory/scoped_ptr.h"
 #include "base/message_pump.h"
 #include "base/message_pump_glib.h"
 #include "base/message_pump_dispatcher.h"
 #include "base/message_pump_observer.h"
 
 #include <bitset>
 
 #include <glib.h>
 
 typedef struct _XDisplay Display;
 
 namespace base {
 
 // This class implements a message-pump for dispatching X events.
 class BASE_EXPORT MessagePumpX : public MessagePumpGlib {
  public:
   MessagePumpX();
-  virtual ~MessagePumpX();
 
   // Returns default X Display.
   static Display* GetDefaultXDisplay();
 
   // Returns true if the system supports XINPUT2.
   static bool HasXInput2();
 
   // Sets the default dispatcher to process native events.
   static void SetDefaultDispatcher(MessagePumpDispatcher* dispatcher);
 
   // Internal function. Called by the glib source dispatch function. Processes
   // all available X events.
   gboolean DispatchXEvents();
 
+ protected:
+  virtual ~MessagePumpX();
+
  private:
   // Initializes the glib event source for X.
   void InitXSource();
 
   // Dispatches the XEvent and returns true if we should exit the current loop
   // of message processing.
   bool ProcessXEvent(MessagePumpDispatcher* dispatcher, XEvent* event);
 
   // Sends the event to the observers. If an observer returns true, then it does
   // not send the event to any other observers and returns true. Returns false
   // if no observer returns true.
   bool WillProcessXEvent(XEvent* xevent);
   void DidProcessXEvent(XEvent* xevent);
 
   // The event source for X events.
   GSource* x_source_;
 
   // The poll attached to |x_source_|.
   scoped_ptr<GPollFD> x_poll_;
 
   DISALLOW_COPY_AND_ASSIGN(MessagePumpX);
 };
 
 typedef MessagePumpX MessagePumpForUI;
 
 }  // namespace base
 
 #endif  // BASE_MESSAGE_PUMP_X_H