Update browser cache of accessibility tree on renderer sub-tree changes....

chrome/renderer/render_view.h

Index: chrome/renderer/render_view.h
===================================================================
--- chrome/renderer/render_view.h	(revision 57122)
+++ chrome/renderer/render_view.h	(working copy)
@@ -396,6 +396,8 @@
       const WebKit::WebAccessibilityObject& acc_obj);
   virtual void didChangeAccessibilityObjectState(
       const WebKit::WebAccessibilityObject& acc_obj);
+  virtual void didChangeAccessibilityObjectChildren(
+      const WebKit::WebAccessibilityObject& acc_obj);
   virtual void didUpdateInspectorSetting(const WebKit::WebString& key,
                                          const WebKit::WebString& value);
   virtual void queryAutofillSuggestions(const WebKit::WebNode& node,
@@ -705,6 +707,7 @@
   // render_messages_internal.h for the message that the function is handling.
 
   void OnAccessibilityDoDefaultAction(int acc_obj_id);
+  void OnAccessibilityObjectChildrenChangeAck();
   void OnAllowBindings(int enabled_bindings_flags);
   void OnAddMessageToConsole(const string16& frame_xpath,
                              const string16& message,
@@ -1237,6 +1240,8 @@
   // maintains the cache and other features of the accessibility tree.
   scoped_ptr<WebKit::WebAccessibilityCache> accessibility_;
 
+  std::vector<webkit_glue::WebAccessibility> accessibility_changes_;
+
   // The speech dispatcher attached to this view, lazily initialized.
   scoped_ptr<SpeechInputDispatcher> speech_input_dispatcher_;