Improve the notifications sent from AXTree updates.

content/browser/accessibility/browser_accessibility_manager.h

 // Copyright (c) 2012 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_MANAGER_H_
 #define CONTENT_BROWSER_ACCESSIBILITY_BROWSER_ACCESSIBILITY_MANAGER_H_
 
 #include <vector>
 
 #include "base/containers/hash_tables.h"
@@ skipping 215 matching lines @@
   // True by default, but some platforms want to treat the root
   // scroll offsets separately.
   virtual bool UseRootScrollOffsetsWhenComputingBounds();
 
   // Walk the tree.
   BrowserAccessibility* NextInTreeOrder(BrowserAccessibility* node);
   BrowserAccessibility* PreviousInTreeOrder(BrowserAccessibility* node);
 
   // AXTreeDelegate implementation.
   void OnNodeWillBeDeleted(ui::AXNode* node) override;
+  void OnSubtreeWillBeDeleted(ui::AXNode* node) override;
   void OnNodeCreated(ui::AXNode* node) override;
   void OnNodeChanged(ui::AXNode* node) override;
-  void OnNodeCreationFinished(ui::AXNode* node) override;
-  void OnNodeChangeFinished(ui::AXNode* node) override;
-  void OnRootChanged(ui::AXNode* new_root) override {}
+  void OnAtomicUpdateFinished(
+      bool root_changed,
+      const std::vector<ui::AXTreeDelegate::Change>& changes) override;
 
   BrowserAccessibilityDelegate* delegate() const { return delegate_; }
   void set_delegate(BrowserAccessibilityDelegate* delegate) {
     delegate_ = delegate;
   }
 
   // Get a snapshot of the current tree as an AXTreeUpdate.
   ui::AXTreeUpdate SnapshotAXTreeForTesting();
 
  protected:
   BrowserAccessibilityManager(
       BrowserAccessibilityDelegate* delegate,
       BrowserAccessibilityFactory* factory);
 
   BrowserAccessibilityManager(
       const ui::AXTreeUpdate& initial_tree,
       BrowserAccessibilityDelegate* delegate,
       BrowserAccessibilityFactory* factory);
 
-  // Called at the end of updating the tree.
-  virtual void OnTreeUpdateFinished() {}
-
  private:
   // The following states keep track of whether or not the
   // on-screen keyboard is allowed to be shown.
   enum OnScreenKeyboardState {
     // Never show the on-screen keyboard because this tab is hidden.
     OSK_DISALLOWED_BECAUSE_TAB_HIDDEN,
 
     // This tab was just shown, so don't pop-up the on-screen keyboard if a
     // text field gets focus that wasn't the result of an explicit touch.
     OSK_DISALLOWED_BECAUSE_TAB_JUST_APPEARED,
@@ skipping 30 matching lines @@
   OnScreenKeyboardState osk_state_;
 
   BrowserAccessibilityFindInPageInfo find_in_page_info_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserAccessibilityManager);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_ACCESSIBILITY_BROWSER_ACCESSIBILITY_MANAGER_H_