Add handling to respect role attribute in AXObjects.

Source/modules/accessibility/AXProgressIndicator.h

 /*
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 16 matching lines @@
 
 class AXObjectCacheImpl;
 class HTMLProgressElement;
 class LayoutProgress;
 
 class AXProgressIndicator final : public AXLayoutObject {
 public:
     static PassRefPtr<AXProgressIndicator> create(LayoutProgress*, AXObjectCacheImpl*);
 
 private:
-    virtual AccessibilityRole roleValue() const override { return ProgressIndicatorRole; }
+    virtual AccessibilityRole roleValue() const override;
 
     virtual bool isProgressIndicator() const override { return true; }
 
     virtual float valueForRange() const override;
     virtual float maxValueForRange() const override;
     virtual float minValueForRange() const override;
 
     AXProgressIndicator(LayoutProgress*, AXObjectCacheImpl*);
 
     HTMLProgressElement* element() const;
     virtual bool computeAccessibilityIsIgnored() const override;
 };
 
 
 } // namespace blink
 
 #endif // AXProgressIndicator_h