Send Android accessibility event when object location changes

content/browser/accessibility/browser_accessibility.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_H_
 #define CONTENT_BROWSER_ACCESSIBILITY_BROWSER_ACCESSIBILITY_H_
 
 #include <map>
 #include <utility>
 #include <vector>
@@ skipping 47 matching lines @@
 
   // Called after an atomic update to the tree finished and this object
   // was created or changed in this update.
   virtual void OnUpdateFinished() {}
 
   // Returns true if this is a native platform-specific object, vs a
   // cross-platform generic object.
   virtual bool IsNative() const;
 
   // Called when the location changed.
-  virtual void OnLocationChanged() const {}
+  virtual void OnLocationChanged() {}
 
   // Return true if this object is equal to or a descendant of |ancestor|.
   bool IsDescendantOf(BrowserAccessibility* ancestor);
 
   // Returns true if this is a leaf node on this platform, meaning any
   // children should not be exposed to this platform's native accessibility
   // layer. Each platform subclass should implement this itself.
   // The definition of a leaf may vary depending on the platform,
   // but a leaf node should never have children that are focusable or
   // that might send notifications.
@@ skipping 183 matching lines @@
   std::string name_;
   std::string value_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(BrowserAccessibility);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_ACCESSIBILITY_BROWSER_ACCESSIBILITY_H_