Fix component=shared_library build for touchui.

base/message_pump_glib_x_dispatch.h

 // Copyright (c) 2011 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_GLIB_X_DISPATCH_H
 #define BASE_MESSAGE_PUMP_GLIB_X_DISPATCH_H
 
+#include "base/base_api.h"
 #include "base/message_pump.h"
 #include "base/message_pump_glib.h"
 
 typedef union _XEvent XEvent;
 
 namespace base {
 
 // The message pump used for TOUCH_UI on linux is MessagePumpGlibX, which can
 // dispatch both GdkEvents* and XEvents* captured directly from X.
 // MessagePumpForUI::Dispatcher provides the mechanism for dispatching
 // GdkEvents. This class provides additional mechanism for dispatching XEvents.
 class MessagePumpGlibXDispatcher : public MessagePumpForUI::Dispatcher {
  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.
   };
 
   // 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 DispatchX(XEvent* xevent) = 0;
 };
 
-class MessagePumpXObserver : public MessagePumpForUI::Observer {
+class BASE_API MessagePumpXObserver : public MessagePumpForUI::Observer {
  public:
   // This method is called before processing an XEvent. If the method returns
   // true, it indicates the event has already been handled, so the event is not
   // processed any farther. If the method returns false, the event dispatching
   // proceeds as normal.
   virtual bool WillProcessXEvent(XEvent* xevent);
 };
 
 }  // namespace base
 
 #endif  // BASE_MESSAGE_PUMP_GLIB_X_DISPATCH_H