Added layout test for aria-orientation and cleaned up code. Also exposed hr element with an orienta…

Source/modules/accessibility/AXLayoutObject.h

 /*
  * Copyright (C) 2008 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 87 matching lines @@
     // Whether objects are ignored, i.e. not included in the tree.
     AXObjectInclusion defaultObjectInclusion(IgnoredReasons* = nullptr) const override;
     bool computeAccessibilityIsIgnored(IgnoredReasons* = nullptr) const override;
 
     // Properties of static elements.
     const AtomicString& accessKey() const override;
     RGBA32 backgroundColor() const final;
     RGBA32 color() const final;
     // Font size is in pixels.
     float fontSize() const final;
-    AccessibilityOrientation orientation() const override;
     String text() const override;
     AccessibilityTextDirection textDirection() const final;
     int textLength() const override;
     TextStyle textStyle() const final;
     KURL url() const override;
 
     // Inline text boxes.
     void loadInlineTextBoxes() override;
     AXObject* nextOnLine() const override;
     AXObject* previousOnLine() const override;
@@ skipping 109 matching lines @@
     AXRange textControlSelection() const;
     int indexForVisiblePosition(const VisiblePosition&) const;
     AXLayoutObject* getUnignoredObjectFromNode(Node&) const;
 };
 
 DEFINE_AX_OBJECT_TYPE_CASTS(AXLayoutObject, isAXLayoutObject());
 
 } // namespace blink
 
 #endif // AXLayoutObject_h