Make MessageCenter a singleton object and build on Windows.

ash/system/web_notification/web_notification_tray_unittest.cc

 // Copyright (c) 2012 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 "ash/system/web_notification/web_notification_tray.h"
 
 #include <vector>
 
 #include "ash/root_window_controller.h"
 #include "ash/system/status_area_widget.h"
@@ skipping 14 matching lines @@
 
 namespace {
 
 WebNotificationTray* GetWebNotificationTray() {
   return Shell::GetPrimaryRootWindowController()->status_area_widget()->
       web_notification_tray();
 }
 
 class TestDelegate : public message_center::MessageCenter::Delegate {
  public:
-  TestDelegate() {}
-  virtual ~TestDelegate() {}
+  TestDelegate(message_center::MessageCenter* message_center)
+    : message_center_(message_center) {
+    message_center_->SetDelegate(this);
+  }
+  virtual ~TestDelegate() {
+    message_center_->SetDelegate(NULL);
+    message_center_->notification_list()->RemoveAllNotifications();
+  }
 
   // WebNotificationTray::Delegate overrides.
   virtual void NotificationRemoved(const std::string& notifcation_id) {
     notification_ids_.erase(notifcation_id);
   }
 
   virtual void DisableExtension(const std::string& notifcation_id) {
   }
 
   virtual void DisableNotificationsFromSource(
@@ skipping 34 matching lines @@
     tray->message_center()->RemoveNotification(id);
     notification_ids_.erase(id);
   }
 
   bool HasNotificationId(const std::string& id) {
     return notification_ids_.find(id) != notification_ids_.end();
   }
 
  private:
   std::set<std::string> notification_ids_;
+  message_center::MessageCenter* message_center_;
 
   DISALLOW_COPY_AND_ASSIGN(TestDelegate);
 };
 
 }  // namespace
 
 typedef test::AshTestBase WebNotificationTrayTest;
 
 TEST_F(WebNotificationTrayTest, WebNotifications) {
   WebNotificationTray* tray = GetWebNotificationTray();
-  scoped_ptr<TestDelegate> delegate(new TestDelegate);
   message_center::MessageCenter* message_center = tray->message_center();
-  message_center->SetDelegate(delegate.get());
+  scoped_ptr<TestDelegate> delegate(new TestDelegate(message_center));
   ASSERT_TRUE(tray->GetWidget());
 
   // Add a notification.
   delegate->AddNotification(tray, "test_id1");
   EXPECT_EQ(1u, tray->message_center()->NotificationCount());
   EXPECT_TRUE(message_center->notification_list()->HasNotification("test_id1"));
   delegate->AddNotification(tray, "test_id2");
   delegate->AddNotification(tray, "test_id2");
   EXPECT_EQ(2u, tray->message_center()->NotificationCount());
   EXPECT_TRUE(message_center->notification_list()->HasNotification("test_id2"));
@@ skipping 16 matching lines @@
 
   // Remove the remianing notification.
   delegate->RemoveNotification(tray, "test_id3");
   EXPECT_EQ(0u, tray->message_center()->NotificationCount());
   EXPECT_FALSE(message_center->notification_list()->HasNotification(
       "test_id3"));
 }
 
 TEST_F(WebNotificationTrayTest, WebNotificationPopupBubble) {
   WebNotificationTray* tray = GetWebNotificationTray();
-  scoped_ptr<TestDelegate> delegate(new TestDelegate);
-  tray->message_center()->SetDelegate(delegate.get());
+  scoped_ptr<TestDelegate> delegate(new TestDelegate(tray->message_center()));
 
   ASSERT_TRUE(tray->GetWidget());
 
   // Adding a notification should show the popup bubble.
   delegate->AddNotification(tray, "test_id1");
   EXPECT_TRUE(tray->popup_bubble() != NULL);
 
   // Updating a notification should not hide the popup bubble.
   delegate->AddNotification(tray, "test_id2");
   delegate->UpdateNotification(tray, "test_id2", "test_id3");
   EXPECT_TRUE(tray->popup_bubble() != NULL);
 
   // Removing the first notification should not hide the popup bubble.
   delegate->RemoveNotification(tray, "test_id1");
   EXPECT_TRUE(tray->popup_bubble() != NULL);
 
   // Removing the visible notification should hide the popup bubble.
   delegate->RemoveNotification(tray, "test_id3");
   EXPECT_TRUE(tray->popup_bubble() == NULL);
 }
 
 using message_center::NotificationList;
 
 TEST_F(WebNotificationTrayTest, ManyMessageCenterNotifications) {
   WebNotificationTray* tray = GetWebNotificationTray();
-  scoped_ptr<TestDelegate> delegate(new TestDelegate);
-  tray->message_center()->SetDelegate(delegate.get());
+  scoped_ptr<TestDelegate> delegate(new TestDelegate(tray->message_center()));
 
   // Add the max visible notifications +1, ensure the correct visible number.
   size_t notifications_to_add =
       NotificationList::kMaxVisibleMessageCenterNotifications + 1;
   for (size_t i = 0; i < notifications_to_add; ++i) {
     std::string id = StringPrintf("test_id%d", static_cast<int>(i));
     delegate->AddNotification(tray, id);
   }
   tray->ShowMessageCenterBubble();
   RunAllPendingInMessageLoop();
   EXPECT_TRUE(tray->message_center_bubble() != NULL);
   EXPECT_EQ(notifications_to_add,
             tray->message_center()->NotificationCount());
   EXPECT_EQ(NotificationList::kMaxVisibleMessageCenterNotifications,
             tray->GetMessageCenterBubbleForTest()->NumMessageViewsForTest());
 }
 
 TEST_F(WebNotificationTrayTest, ManyPopupNotifications) {
   WebNotificationTray* tray = GetWebNotificationTray();
-  scoped_ptr<TestDelegate> delegate(new TestDelegate);
-  tray->message_center()->SetDelegate(delegate.get());
+  scoped_ptr<TestDelegate> delegate(new TestDelegate(tray->message_center()));
 
   // Add the max visible popup notifications +1, ensure the correct num visible.
   size_t notifications_to_add =
       NotificationList::kMaxVisiblePopupNotifications + 1;
   for (size_t i = 0; i < notifications_to_add; ++i) {
     std::string id = StringPrintf("test_id%d", static_cast<int>(i));
     delegate->AddNotification(tray, id);
   }
   // Hide and reshow the bubble so that it is updated immediately, not delayed.
   tray->HidePopupBubble();
   tray->ShowPopupBubble();
   EXPECT_TRUE(tray->popup_bubble() != NULL);
   EXPECT_EQ(notifications_to_add,
             tray->message_center()->NotificationCount());
   EXPECT_EQ(NotificationList::kMaxVisiblePopupNotifications,
             tray->GetPopupBubbleForTest()->NumMessageViewsForTest());
 }
 
 }  // namespace ash