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

ui/wm/core/masked_window_targeter.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_MASKED_WINDOW_TARGETER_H_
 #define UI_WM_CORE_MASKED_WINDOW_TARGETER_H_
 
 #include "ui/aura/window_targeter.h"
-#include "ui/wm/core/wm_core_export.h"
+#include "ui/wm/wm_export.h"
 
 namespace gfx {
 class Path;
 }
 
 namespace wm {
 
-class WM_CORE_EXPORT MaskedWindowTargeter : public aura::WindowTargeter {
+class WM_EXPORT MaskedWindowTargeter : public aura::WindowTargeter {
  public:
   explicit MaskedWindowTargeter(aura::Window* masked_window);
   virtual ~MaskedWindowTargeter();
 
  protected:
   // Sets the hit-test mask for |window| in |mask| (in |window|'s local
   // coordinate system). Returns whether a valid mask has been set in |mask|.
   virtual bool GetHitTestMask(aura::Window* window, gfx::Path* mask) const = 0;
 
   // aura::WindowTargeter:
   virtual bool EventLocationInsideBounds(
       aura::Window* window,
       const ui::LocatedEvent& event) const OVERRIDE;
 
  private:
   aura::Window* masked_window_;
 
   DISALLOW_COPY_AND_ASSIGN(MaskedWindowTargeter);
 };
 
 }  // namespace wm
 
 #endif  // UI_WM_CORE_MASKED_WINDOW_TARGETER_H_