Keep track of accessibility focus across windows.

chrome/browser/ui/aura/accessibility/automation_manager_aura.cc

 // Copyright 2014 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.
 
 #include "chrome/browser/ui/aura/accessibility/automation_manager_aura.h"
 
 #include <stddef.h>
 
 #include <vector>
 
@@ skipping 128 matching lines @@
     pending_events_.push_back(std::make_pair(aura_obj, event_type));
     return;
   }
   processing_events_ = true;
 
   ExtensionMsg_AccessibilityEventParams params;
   if (!current_tree_serializer_->SerializeChanges(aura_obj, &params.update)) {
     LOG(ERROR) << "Unable to serialize one accessibility event.";
     return;
   }
+
+  // Make sure the focused node is serialized.
+  views::AXAuraObjWrapper* focus =
+      views::AXAuraObjCache::GetInstance()->GetFocus();
+  if (focus)
+    current_tree_serializer_->SerializeChanges(focus, &params.update);
+
   params.tree_id = 0;
   params.id = aura_obj->GetID();
   params.event_type = event_type;
   AutomationEventRouter* router = AutomationEventRouter::GetInstance();
   router->DispatchAccessibilityEvent(params);
 
   processing_events_ = false;
   auto pending_events_copy = pending_events_;
   pending_events_.clear();
   for (size_t i = 0; i < pending_events_copy.size(); ++i) {
     SendEvent(context,
               pending_events_copy[i].first,
               pending_events_copy[i].second);
   }
 }