[Eraser] First pass at removing the notification center panel.

chrome/browser/notifications/message_center_notification_manager.cc

Index: chrome/browser/notifications/message_center_notification_manager.cc
diff --git a/chrome/browser/notifications/message_center_notification_manager.cc b/chrome/browser/notifications/message_center_notification_manager.cc
index b57ad7e6bcb19785f8c6b4e18bd3196e9b68b806..eb19cd688df158782d6c6dae6973d0cbf5ea0003 100644
--- a/chrome/browser/notifications/message_center_notification_manager.cc
+++ b/chrome/browser/notifications/message_center_notification_manager.cc
@@ -6,8 +6,6 @@
 
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
-#include "base/prefs/pref_registry_simple.h"
-#include "base/prefs/pref_service.h"
 #include "base/stl_util.h"
 #include "base/strings/stringprintf.h"
 #include "chrome/browser/extensions/api/notification_provider/notification_provider_api.h"
@@ -21,7 +19,6 @@
 #include "chrome/browser/notifications/screen_lock_notification_blocker.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/common/extensions/api/notification_provider.h"
-#include "chrome/common/pref_names.h"
 #include "content/public/browser/web_contents.h"
 #include "content/public/common/url_constants.h"
 #include "extensions/browser/extension_registry.h"
@@ -43,34 +40,15 @@
 #include "ash/system/web_notification/web_notification_tray.h"
 #endif
 
-#if defined(OS_WIN)
-// The first-run balloon will be shown |kFirstRunIdleDelaySeconds| after all
-// popups go away and the user has notifications in the message center.
-const int kFirstRunIdleDelaySeconds = 1;
-#endif
-
 MessageCenterNotificationManager::MessageCenterNotificationManager(
     message_center::MessageCenter* message_center,
-    PrefService* local_state,
     scoped_ptr<message_center::NotifierSettingsProvider> settings_provider)
     : message_center_(message_center),
-#if defined(OS_WIN)
-      first_run_idle_timeout_(
-          base::TimeDelta::FromSeconds(kFirstRunIdleDelaySeconds)),
-#endif
       settings_provider_(settings_provider.Pass()),
       system_observer_(this),
       stats_collector_(message_center),
       google_now_stats_collector_(message_center)
-#if defined(OS_WIN)
-      ,
-      weak_factory_(this)
-#endif
 {
-#if defined(OS_WIN)
-  first_run_pref_.Init(prefs::kMessageCenterShowedFirstRunBalloon, local_state);
-#endif
-
   message_center_->AddObserver(this);
   message_center_->SetNotifierSettingsProvider(settings_provider_.get());
 
@@ -99,14 +77,6 @@ MessageCenterNotificationManager::~MessageCenterNotificationManager() {
   profile_notifications_.clear();
 }
 
-void MessageCenterNotificationManager::RegisterPrefs(
-    PrefRegistrySimple* registry) {
-  registry->RegisterBooleanPref(prefs::kMessageCenterShowedFirstRunBalloon,
-                                false);
-  registry->RegisterBooleanPref(prefs::kMessageCenterShowIcon, true);
-  registry->RegisterBooleanPref(prefs::kMessageCenterForcedOnTaskbar, false);
-}
-
 ////////////////////////////////////////////////////////////////////////////////
 // NotificationUIManager
 
@@ -305,29 +275,18 @@ void MessageCenterNotificationManager::OnNotificationRemoved(
   NotificationMap::const_iterator iter = profile_notifications_.find(id);
   if (iter != profile_notifications_.end())
     RemoveProfileNotification(iter->second);
-
-#if defined(OS_WIN)
-  CheckFirstRunTimer();
-#endif
 }
 
 void MessageCenterNotificationManager::OnCenterVisibilityChanged(
     message_center::Visibility visibility) {
-#if defined(OS_WIN)
-  if (visibility == message_center::VISIBILITY_TRANSIENT)
-    CheckFirstRunTimer();
-#endif
 }
 
 void MessageCenterNotificationManager::OnNotificationUpdated(
     const std::string& id) {
-#if defined(OS_WIN)
-  CheckFirstRunTimer();
-#endif
 }
 
 void MessageCenterNotificationManager::EnsureMessageCenterClosed() {
-  if (tray_.get())
+  if (tray_.get() && tray_->GetMessageCenterTray())
     tray_->GetMessageCenterTray()->HideMessageCenterBubble();
 
 #if defined(USE_ASH)