ui: Rename ui_export.h to ui_base_export.h

ui/base/x/active_window_watcher_x_observer.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 UI_BASE_X_ACTIVE_WINDOW_WATCHER_X_OBSERVER_H_
 #define UI_BASE_X_ACTIVE_WINDOW_WATCHER_X_OBSERVER_H_
 
 #include <gdk/gdk.h>
 
-#include "ui/base/ui_export.h"
+#include "ui/base/ui_base_export.h"
 
 namespace ui {
 
-class UI_EXPORT ActiveWindowWatcherXObserver {
+class UI_BASE_EXPORT ActiveWindowWatcherXObserver {
  public:
   // |active_window| will be NULL if the active window isn't one of Chrome's.
   virtual void ActiveWindowChanged(GdkWindow* active_window) = 0;
 
  protected:
   virtual ~ActiveWindowWatcherXObserver() {}
 };
 
 }  // namespace ui
 
 #endif  // UI_BASE_X_ACTIVE_WINDOW_WATCHER_X_OBSERVER_H_