Implement computedRole and computedName (behind a flag)

Source/core/dom/AXObjectCache.h

 /*
  * Copyright (C) 2003, 2006, 2007, 2008, 2009, 2010, 2011 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
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 20 matching lines @@
 typedef unsigned AXID;
 
 namespace blink {
 class AXObject;
 class AbstractInlineTextBox;
 class FrameView;
 class Page;
 class RenderMenuList;
 class Widget;
 
+class PublicAXObject {

[dmazzoni, 2014/12/09 00:49:50]

The problem with this is that it exposes the whole ownership/lifecycle outside
of the accessibility module. We want core/ to not understand or care what the
lifecycle of an AXObject is.

I think you should just have methods right on AXObjectCache:

    virtual const AtomicString& computedRoleForNode(Node*) = 0;
    virtual const String computedTextForNode(Node*) = 0;

[aboxhall, 2014/12/13 01:38:36]

I guess I had in mind something like this proposal
http://lists.w3.org/Archives/Public/public-pfwg/2014Oct/0127.html - not to
mention being able to expose more from devtools, eventually.
Ok, done.

+public:
+    virtual const AtomicString& computedRole() = 0;
+    virtual const String computedText() = 0;
+};
+
 class AXObjectCache {
     WTF_MAKE_NONCOPYABLE(AXObjectCache); WTF_MAKE_FAST_ALLOCATED;
 public:
     static AXObjectCache* create(Document&);
 
     static AXObject* focusedUIElementForPage(const Page*);
 
     virtual ~AXObjectCache();
 
     enum AXNotification {
@@ skipping 62 matching lines @@
 
     // Called when the scroll offset changes.
     virtual void handleScrollPositionChanged(FrameView*) = 0;
     virtual void handleScrollPositionChanged(RenderObject*) = 0;
 
     // Called when scroll bars are added / removed (as the view resizes).
     virtual void handleScrollbarUpdate(FrameView*) = 0;
     virtual void handleLayoutComplete(RenderObject*) = 0;
     virtual void handleScrolledToAnchor(const Node* anchorNode) = 0;
 
+    virtual PublicAXObject* publicAXObjectForNode(Node*) = 0;
+
 protected:
     AXObjectCache();
 };
 
+class ScopedAXObjectCache {
+public:
+    explicit ScopedAXObjectCache(Document&);
+    ~ScopedAXObjectCache();
+
+    AXObjectCache* get();
+    AXObjectCache* operator->();
+
+private:
+
+    Document& m_document;
+    AXObjectCache* m_cache;
+    bool m_isScoped;
+};
+
 }
 
 #endif