Pass accessible location change messages to the automation API.

content/public/browser/ax_event_notification_details.h

Index: content/public/browser/ax_event_notification_details.h
diff --git a/content/public/browser/ax_event_notification_details.h b/content/public/browser/ax_event_notification_details.h
index 7054452e820dcb25a2b20e76618fceb8926ef09a..0f2e3cdef916fa8f1f9b93853eea1088d42decc3 100644
--- a/content/public/browser/ax_event_notification_details.h
+++ b/content/public/browser/ax_event_notification_details.h
@@ -9,6 +9,7 @@
 
 #include "content/common/content_export.h"
 #include "ui/accessibility/ax_node_data.h"
+#include "ui/accessibility/ax_relative_bounds.h"
 #include "ui/accessibility/ax_tree_data.h"
 #include "ui/accessibility/ax_tree_update.h"
 
@@ -28,6 +29,20 @@ struct CONTENT_EXPORT AXEventNotificationDetails {
   int ax_tree_id;
 };
 
+// Use this object in conjunction with the
+// |WebContentsObserver::AccessibilityLocationChangeReceived| method.
+struct CONTENT_EXPORT AXLocationChangeNotificationDetails {
+ public:
+  AXLocationChangeNotificationDetails();
+  AXLocationChangeNotificationDetails(
+      const AXLocationChangeNotificationDetails& other);
+  ~AXLocationChangeNotificationDetails();
+
+  int id;
+  int ax_tree_id;
+  ui::AXRelativeBounds new_location;
+};
+
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_AX_EVENT_NOTIFICATION_DETAILS_H_