Keep the mouse cursor within desktop

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"
@@ skipping 12 matching lines @@
 // The nested loop is exited by either posting a quit, or returning EVENT_QUIT
 // from Dispatch.
 class MessagePumpDispatcher {
  public:
   enum DispatchStatus {
     EVENT_IGNORED,    // The event was not processed.
     EVENT_PROCESSED,  // The event has been processed.
     EVENT_QUIT        // The event was processed and the message-loop should
                       // terminate.
   };
+  virtual ~MessagePumpDispatcher() {}
 
   // Dispatches the event. EVENT_IGNORED is returned if the event was ignored
   // (i.e. not processed). EVENT_PROCESSED is returned if the event was
   // processed. The nested loop exits immediately if EVENT_QUIT is returned.
   virtual DispatchStatus Dispatch(XEvent* xevent) = 0;
-
- protected:
-  virtual ~MessagePumpDispatcher() {}
 };
 
 // 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();
@@ skipping 29 matching lines @@
   scoped_ptr<GPollFD> x_poll_;
 
   DISALLOW_COPY_AND_ASSIGN(MessagePumpX);
 };
 
 typedef MessagePumpX MessagePumpForUI;
 
 }  // namespace base
 
 #endif  // BASE_MESSAGE_PUMP_X_H