Don't close ExtensionPopups on child window focus (Win, non-Aura).

ui/views/focus/widget_focus_manager.cc

 // Copyright (c) 2011 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/focus/widget_focus_manager.h"
 
 #include "base/memory/singleton.h"
 
 namespace views {
 
 // WidgetFocusManager ----------------------------------------------------------
 
 // static
 WidgetFocusManager* WidgetFocusManager::GetInstance() {
   return Singleton<WidgetFocusManager>::get();
 }
 
 void WidgetFocusManager::AddFocusChangeListener(
     WidgetFocusChangeListener* listener) {
   focus_change_listeners_.AddObserver(listener);
 }
 
 void WidgetFocusManager::RemoveFocusChangeListener(
     WidgetFocusChangeListener* listener) {
   focus_change_listeners_.RemoveObserver(listener);
 }
 
 void WidgetFocusManager::OnWidgetFocusEvent(gfx::NativeView focused_before,
                                             gfx::NativeView focused_now) {
-  if (enabled_) {
+  if (enabled_ && focused_before != focused_now) {
     FOR_EACH_OBSERVER(WidgetFocusChangeListener, focus_change_listeners_,
                       OnNativeFocusChange(focused_before, focused_now));
   }
 }
 
 WidgetFocusManager::WidgetFocusManager() : enabled_(true) {}
 
 WidgetFocusManager::~WidgetFocusManager() {}
 
 // AutoNativeNotificationDisabler ----------------------------------------------
 
 AutoNativeNotificationDisabler::AutoNativeNotificationDisabler() {
   WidgetFocusManager::GetInstance()->DisableNotifications();
 }
 
 AutoNativeNotificationDisabler::~AutoNativeNotificationDisabler() {
   WidgetFocusManager::GetInstance()->EnableNotifications();
 }
 
 }  // namespace views