Accessible location change events need to update internal data structure

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 <stdint.h>
 
 #include <memory>
@@ skipping 222 matching lines @@
 
   // Fire an event telling native assistive technology to move focus to the
   // given find in page result.
   void ActivateFindInPageResult(int request_id, int match_index);
 
   // Called when the renderer process has notified us of about tree changes.
   virtual void OnAccessibilityEvents(
       const std::vector<AXEventNotificationDetails>& details);
 
   // Called when the renderer process updates the location of accessibility
-  // objects.
-  virtual void OnLocationChanges(
+  // objects. Calls SendLocationChangeEvents(), which can be overridden.
+  void OnLocationChanges(
       const std::vector<AccessibilityHostMsg_LocationChangeParams>& params);
 
   // Called when a new find in page result is received. We hold on to this
   // information and don't activate it until the user requests it.
   void OnFindInPageResult(
       int request_id, int match_index, int start_id, int start_offset,
       int end_id, int end_offset);
 
   // Called in response to a hit test, when the object hit has a child frame
   // (like an iframe element or browser plugin), and we need to do another
@@ skipping 104 matching lines @@
  protected:
   BrowserAccessibilityManager(
       BrowserAccessibilityDelegate* delegate,
       BrowserAccessibilityFactory* factory);
 
   BrowserAccessibilityManager(
       const ui::AXTreeUpdate& initial_tree,
       BrowserAccessibilityDelegate* delegate,
       BrowserAccessibilityFactory* factory);
 
+  // Send platform-specific notifications to each of these objects that
+  // their location has changed. This is called by OnLocationChanges
+  // after it's updated the internal data structure.
+  virtual void SendLocationChangeEvents(
+      const std::vector<AccessibilityHostMsg_LocationChangeParams>& params);
+
  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 48 matching lines @@
   // node within that parent tree. It's computed as needed and cached for
   // speed so that it can be accessed quickly if it hasn't changed.
   int parent_node_id_from_parent_tree_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserAccessibilityManager);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_ACCESSIBILITY_BROWSER_ACCESSIBILITY_MANAGER_H_