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

Source/modules/accessibility/AXMediaControls.h

 /*
  * Copyright (C) 2009 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
@@ skipping 12 matching lines @@
  * 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 AXMediaControls_h
 #define AXMediaControls_h
 
-#include "core/accessibility/AXSlider.h"
 #include "core/html/shadow/MediaControlElements.h"
+#include "modules/accessibility/AXSlider.h"
 
 namespace blink {
 
 class AccessibilityMediaControl : public AXRenderObject {
 
 public:
     static PassRefPtr<AXObject> create(RenderObject*);
     virtual ~AccessibilityMediaControl() { }
 
     virtual AccessibilityRole roleValue() const override;
@@ skipping 55 matching lines @@
 
 private:
     explicit AccessibilityMediaTimeDisplay(RenderObject*);
     virtual bool computeAccessibilityIsIgnored() const override;
 };
 
 
 } // namespace blink
 
 #endif // AXMediaControls_h