Relanding http://codereview.chromium.org/8416034

content/browser/accessibility/browser_accessibility.h

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_BROWSER_ACCESSIBILITY_BROWSER_ACCESSIBILITY_H_
 #define CONTENT_BROWSER_ACCESSIBILITY_BROWSER_ACCESSIBILITY_H_
 #pragma once
 
 #include <map>
 #include <utility>
@@ skipping 37 matching lines @@
 
   virtual ~BrowserAccessibility();
 
   // Detach all descendants of this subtree and push all of the node pointers,
   // including this node, onto the end of |nodes|.
   virtual void DetachTree(std::vector<BrowserAccessibility*>* nodes);
 
   // Perform platform specific initialization. This can be called multiple times
   // during the lifetime of this instance after the members of this base object
   // have been reset with new values from the renderer process.
-  virtual void Initialize();
-
-  // Optionally send events triggered simply by the fact that this node
-  // has been created or modified (and has been attached to the tree).
-  // This can include "show" events, "text changed" events in live regions,
-  // or "alert" events.
-  virtual void SendNodeUpdateEvents() {}
+  // Child dependent initialization can be done here.
+  virtual void PostInitialize() {}
 
   // Initialize this object, reading attributes from |src|. Does not
   // recurse into children of |src| and build the whole subtree.
-  void Initialize(BrowserAccessibilityManager* manager,
-                  BrowserAccessibility* parent,
-                  int32 child_id,
-                  int32 index_in_parent,
-                  const WebAccessibility& src);
+  void PreInitialize(BrowserAccessibilityManager* manager,
+      BrowserAccessibility* parent,
+      int32 child_id,
+      int32 index_in_parent,
+      const WebAccessibility& src);
 
   // Add a child of this object.
   void AddChild(BrowserAccessibility* child);
 
   // Update the parent and index in parent if this node has been moved.
   void UpdateParent(BrowserAccessibility* parent, int index_in_parent);
 
   // Return true if this object is equal to or a descendant of |ancestor|.
   bool IsDescendantOf(BrowserAccessibility* ancestor);
 
@@ skipping 134 matching lines @@
   // returns true if found.
   bool GetHtmlAttribute(const char* attr, string16* value) const;
 
   // Returns true if this node is an editable text field of any kind.
   bool IsEditableText() const;
 
   // Append the text from this node and its children.
   string16 GetTextRecursive() const;
 
  protected:
+  // Perform platform specific initialization. This can be called multiple times
+  // during the lifetime of this instance after the members of this base object
+  // have been reset with new values from the renderer process.
+  // Perform child independent initialization in this method.
+  virtual void PreInitialize();
+
   BrowserAccessibility();
 
   // The manager of this tree of accessibility objects; needed for
   // global operations like focus tracking.
   BrowserAccessibilityManager* manager_;
 
   // The parent of this object, may be NULL if we're the root object.
   BrowserAccessibility* parent_;
 
   // The ID of this object; globally unique within the browser process.
@@ skipping 33 matching lines @@
   // tree, a client may still be holding onto a pointer to this object, so
   // we mark it as inactive so that calls to any of this object's methods
   // immediately return failure.
   bool instance_active_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(BrowserAccessibility);
 };
 
 #endif  // CONTENT_BROWSER_ACCESSIBILITY_BROWSER_ACCESSIBILITY_H_