System bubbles work with webui login display

chrome/browser/chromeos/setting_level_bubble.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 "chrome/browser/chromeos/setting_level_bubble.h"
 
 #include <gdk/gdk.h>
 
 #include "base/timer.h"
 #include "chrome/browser/chromeos/login/background_view.h"
 #include "chrome/browser/chromeos/login/login_utils.h"
+#include "chrome/browser/chromeos/login/webui_login_display.h"
 #include "chrome/browser/chromeos/setting_level_bubble_view.h"
 #include "chrome/browser/profiles/profile_manager.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_list.h"
 #include "chrome/browser/ui/browser_window.h"
 #include "chrome/browser/ui/views/bubble/bubble.h"
 #include "ui/gfx/screen.h"
 #include "views/widget/root_view.h"
 
 namespace {
@@ skipping 36 matching lines @@
           true);  // match_incognito
   if (browser) {
     window = GTK_WINDOW(browser->window()->GetNativeHandle());
   } else {
     // Otherwise, see if there's a background window that we can use.
     BackgroundView* background = LoginUtils::Get()->GetBackgroundView();
     if (background)
       window = GTK_WINDOW(background->GetNativeWindow());
   }
 
-  if (!window)
-    return NULL;
-
-  return views::Widget::GetWidgetForNativeWindow(window);
+  if (window)
+    return views::Widget::GetWidgetForNativeWindow(window);
+  else
+    return WebUILoginDisplay::GetLoginWindow();
 }
 
 SettingLevelBubble::SettingLevelBubble(SkBitmap* increase_icon,
                                        SkBitmap* decrease_icon,
                                        SkBitmap* zero_icon)
     : previous_percent_(-1),
       current_percent_(-1),
       increase_icon_(increase_icon),
       decrease_icon_(decrease_icon),
       zero_icon_(zero_icon),
@@ skipping 13 matching lines @@
   current_percent_ = percent;
 
   SkBitmap* icon = increase_icon_;
   if (current_percent_ == 0)
     icon = zero_icon_;
   else if (current_percent_ < previous_percent_)
     icon = decrease_icon_;
 
   if (!bubble_) {
     views::Widget* parent_widget = GetToplevelWidget();
-    if (parent_widget == NULL)
+    if (parent_widget == NULL) {
+      LOG(WARNING) << "Unable to locate parent widget to display a bubble";
       return;
+    }
     DCHECK(view_ == NULL);
     view_ = new SettingLevelBubbleView;
     view_->Init(icon, previous_percent_);
 
     // Calculate the position in screen coordinates that the bubble should
     // "point" at (since we use BubbleBorder::FLOAT, this position actually
     // specifies the center of the bubble).
     const gfx::Rect monitor_area =
         gfx::Screen::GetMonitorAreaNearestWindow(
             GTK_WIDGET(parent_widget->GetNativeWindow()));
@@ skipping 72 matching lines @@
 void SettingLevelBubble::AnimationProgressed(const ui::Animation* animation) {
   if (view_) {
     view_->Update(
         ui::Tween::ValueBetween(animation->GetCurrentValue(),
                                 previous_percent_,
                                 current_percent_));
   }
 }
 
 }  // namespace chromeos