Fix image map focus ring painting

third_party/WebKit/Source/modules/accessibility/AXImageMapLink.cpp

 /*
  * 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 86 matching lines @@
 KURL AXImageMapLink::url() const
 {
     if (!areaElement())
         return KURL();
 
     return areaElement()->href();
 }
 
 LayoutRect AXImageMapLink::elementRect() const
 {
-    HTMLAreaElement* area = areaElement();
-    HTMLMapElement* map = mapElement();

[pdr., 2016/04/23 03:32:22]

We seem to have lost this code which uses the mapElement() to compute the rect.
Does that change behavior?

[Xianzhu, 2016/04/25 23:18:15]

I gave up changing this in this CL. Filed bug 606506 instead.

-    if (!area || !map)
-        return LayoutRect();
-
-    LayoutObject* layoutObject;
-    if (m_parent && m_parent->isAXLayoutObject())

[pdr., 2016/04/23 03:32:23]

We no longer have this accessibility code which seems useful for screenreaders.
Does this introduce a bug? Is it testable?

-        layoutObject = toAXLayoutObject(m_parent)->getLayoutObject();
-    else
-        layoutObject = map->layoutObject();
-
-    if (!layoutObject)
-        return LayoutRect();
-
-    return area->computeRect(layoutObject);
+    if (HTMLAreaElement* area = areaElement())
+        return area->computeAbsoluteRect();
+    return LayoutRect();
 }
 
 DEFINE_TRACE(AXImageMapLink)
 {
     AXNodeObject::trace(visitor);
 }
 
 } // namespace blink