Update focus when widget changes visibility.

ui/views/accessibility/ax_aura_obj_cache.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 "ui/views/accessibility/ax_aura_obj_cache.h"
 
 #include "base/memory/ptr_util.h"
 #include "base/memory/singleton.h"
 #include "ui/aura/client/focus_client.h"
 #include "ui/aura/window.h"
@@ skipping 98 matching lines @@
   }
 }
 
 AXAuraObjWrapper* AXAuraObjCache::GetFocus() {
   View* focused_view = GetFocusedView();
   if (focused_view)
     return GetOrCreate(focused_view);
   return nullptr;
 }
 
+void AXAuraObjCache::OnFocusedViewChanged() {
+  View* view = GetFocusedView();
+  if (view)
+    view->NotifyAccessibilityEvent(ui::AX_EVENT_FOCUS, true);
+}
+
 AXAuraObjCache::AXAuraObjCache()
     : current_id_(1),
       focus_client_(nullptr),
       is_destroying_(false),
       delegate_(nullptr) {}
 
 AXAuraObjCache::~AXAuraObjCache() {
   is_destroying_ = true;
   cache_.clear();
 }
@@ skipping 24 matching lines @@
 
   View* focused_view = focus_manager->GetFocusedView();
   if (focused_view)
     return focused_view;
   else
     return focused_widget->GetRootView();
 }
 
 void AXAuraObjCache::OnWindowFocused(aura::Window* gained_focus,
                                      aura::Window* lost_focus) {
-  View* view = GetFocusedView();
-  if (view)
-    view->NotifyAccessibilityEvent(ui::AX_EVENT_FOCUS, true);
+  OnFocusedViewChanged();
 }
 
 void AXAuraObjCache::OnWindowDestroying(aura::Window* window) {
   focus_client_ = nullptr;
 }
 
 template <typename AuraViewWrapper, typename AuraView>
 AXAuraObjWrapper* AXAuraObjCache::CreateInternal(
     AuraView* aura_view,
     std::map<AuraView*, int32_t>& aura_view_to_id_map) {
@@ skipping 31 matching lines @@
     AuraView* aura_view,
     std::map<AuraView*, int32_t>& aura_view_to_id_map) {
   int32_t id = GetID(aura_view);
   if (id == -1)
     return;
   aura_view_to_id_map.erase(aura_view);
   Remove(id);
 }
 
 }  // namespace views