Create Source/modules/accessibility/ and move most of core/accessibility/* into it

Source/modules/accessibility/AXMockObject.h

 /*
  * Copyright (C) 2011 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
  *     notice, this list of conditions and the following disclaimer in the
  *     documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef AXMockObject_h
 #define AXMockObject_h
 
-#include "core/accessibility/AXObject.h"
+#include "modules/accessibility/AXObject.h"
 
 namespace blink {
 
 class AXMockObject : public AXObject {
 
 protected:
     AXMockObject();
 public:
     virtual ~AXMockObject();
 
     // AXObject overrides.
     virtual AXObject* computeParent() const override { return m_parent; }
     virtual bool isEnabled() const override { return true; }
 
 private:
     virtual bool isMockObject() const override final { return true; }
 
     virtual bool computeAccessibilityIsIgnored() const override;
 };
 
 DEFINE_AX_OBJECT_TYPE_CASTS(AXMockObject, isMockObject());
 
 } // namespace blink
 
 #endif // AXMockObject_h