Revert of Rename wm_core_export.h to wm_export.h and the wm_core target to just wm

ui/wm/core/transient_window_manager.h

 // Copyright 2014 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_WM_CORE_TRANSIENT_WINDOW_MANAGER_H_
 #define UI_WM_CORE_TRANSIENT_WINDOW_MANAGER_H_
 
 #include <vector>
 
 #include "base/observer_list.h"
 #include "ui/aura/window_observer.h"
-#include "ui/wm/wm_export.h"
+#include "ui/wm/core/wm_core_export.h"
 
 namespace wm {
 
 class TransientWindowObserver;
 
 // TransientWindowManager manages the set of transient children for a window
 // along with the transient parent. Transient children get the following
 // behavior:
 // . The transient parent destroys any transient children when it is
 //   destroyed. This means a transient child is destroyed if either its parent
 //   or transient parent is destroyed.
 // . If a transient child and its transient parent share the same parent, then
 //   transient children are always ordered above the transient parent.
 // Transient windows are typically used for popups and menus.
 // TODO(sky): when we nuke TransientWindowClient rename this to
 // TransientWindowController.
-class WM_EXPORT TransientWindowManager : public aura::WindowObserver {
+class WM_CORE_EXPORT TransientWindowManager : public aura::WindowObserver {
  public:
   typedef std::vector<aura::Window*> Windows;
 
   virtual ~TransientWindowManager();
 
   // Returns the TransientWindowManager for |window|. This never returns NULL.
   static TransientWindowManager* Get(aura::Window* window);
 
   // Returns the TransientWindowManager for |window| only if it already exists.
   // WARNING: this may return NULL.
@@ skipping 42 matching lines @@
   aura::Window* stacking_target_;
 
   ObserverList<TransientWindowObserver> observers_;
 
   DISALLOW_COPY_AND_ASSIGN(TransientWindowManager);
 };
 
 }  // namespace wm
 
 #endif  // UI_WM_CORE_TRANSIENT_WINDOW_MANAGER_H_