Implement aria properties setsize and posinset.

public/web/WebAXObject.h

 /*
  * Copyright (C) 2009 Google 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 174 matching lines @@
     // Takes the result of nameFrom from calling |name|, above, and retrieves the
     // accessible description of the object, which is secondary to |name|, an enum indicating
     // where the description was derived from, and a list of objects that were used to
     // derive the description, if any.
     BLINK_EXPORT WebString description(WebAXNameFrom, WebAXDescriptionFrom&, WebVector<WebAXObject>& descriptionObjects);
     // Takes the result of nameFrom and descriptionFrom from calling |name| and |description|,
     // above, and retrieves the placeholder of the object, if present and if it wasn't already
     // exposed by one of the two functions above.
     BLINK_EXPORT WebString placeholder(WebAXNameFrom, WebAXDescriptionFrom);
 
+    // Position in set & Size of set.

[dmazzoni, 2015/04/16 17:19:48]

Say "1-based position in set" so that it's clear that the first index isn't 0.

+    BLINK_EXPORT int posInSet() const;
+    BLINK_EXPORT int setSize() const;
+
     // Live regions.
     BLINK_EXPORT bool isInLiveRegion() const;
     BLINK_EXPORT bool liveRegionAtomic() const;
     BLINK_EXPORT bool liveRegionBusy() const;
     BLINK_EXPORT WebString liveRegionRelevant() const;
     BLINK_EXPORT WebString liveRegionStatus() const;
     BLINK_EXPORT bool containerLiveRegionAtomic() const;
     BLINK_EXPORT bool containerLiveRegionBusy() const;
     BLINK_EXPORT WebString containerLiveRegionRelevant() const;
     BLINK_EXPORT WebString containerLiveRegionStatus() const;
@@ skipping 75 matching lines @@
     operator WTF::PassRefPtr<AXObject>() const;
 #endif
 
 private:
     WebPrivatePtr<AXObject> m_private;
 };
 
 } // namespace blink
 
 #endif