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

content/browser/accessibility/browser_accessibility.h

Index: content/browser/accessibility/browser_accessibility.h
diff --git a/content/browser/accessibility/browser_accessibility.h b/content/browser/accessibility/browser_accessibility.h
index 9ae0dc9a2efca4974e20abade9496bed904fcc9f..0dfdd0b1eb3f6240ebd2112dd896800f5c4229c0 100644
--- a/content/browser/accessibility/browser_accessibility.h
+++ b/content/browser/accessibility/browser_accessibility.h
@@ -55,21 +55,16 @@ class CONTENT_EXPORT BrowserAccessibility {
   // 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);
@@ -224,6 +219,12 @@ class CONTENT_EXPORT BrowserAccessibility {
   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