Implement Non-Closable Notification

ui/message_center/message_center_impl.cc

 // Copyright (c) 2013 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/message_center/message_center_impl.h"
 
 #include <algorithm>
 #include <deque>
 #include <utility>
 
@@ skipping 628 matching lines @@
     RemoveNotification(notification->id(), false);
   if (!notifications.empty()) {
     notification_cache_.Rebuild(
         notification_list_->GetVisibleNotifications(blockers_));
   }
 }
 
 void MessageCenterImpl::RemoveAllNotifications(bool by_user) {
   // Using not |blockers_| but an empty list since it wants to remove literally
   // all notifications.
-  RemoveNotifications(by_user, NotificationBlockers());
+  RemoveNotifications(by_user,
+                      false /* closable only */,
+                      NotificationBlockers());
 }
 
 void MessageCenterImpl::RemoveAllVisibleNotifications(bool by_user) {
-  RemoveNotifications(by_user, blockers_);
+  RemoveNotifications(by_user,
+                      false /* closable only */,
+                      blockers_);
+}
+
+void MessageCenterImpl::RemoveAllClosableNotifications(bool by_user) {
+  RemoveNotifications(by_user,
+                      true /* closable only */,
+                      blockers_);
 }
 
 void MessageCenterImpl::RemoveNotifications(
     bool by_user,
+    bool only_closable,
     const NotificationBlockers& blockers) {
   const NotificationList::Notifications notifications =
       notification_list_->GetVisibleNotifications(blockers);
   std::set<std::string> ids;
   for (const auto& notification : notifications) {
+    if (only_closable && !notification->closable())
+      continue;
+
     ids.insert(notification->id());
     scoped_refptr<NotificationDelegate> delegate = notification->delegate();
     if (delegate.get())
       delegate->Close(by_user);
     notification_list_->RemoveNotification(notification->id());
   }
 
   if (!ids.empty()) {
     notification_cache_.Rebuild(
         notification_list_->GetVisibleNotifications(blockers_));
@@ skipping 217 matching lines @@
 }
 
 void MessageCenterImpl::EnableChangeQueueForTest(bool enable) {
   if (enable)
     notification_queue_.reset(new internal::ChangeQueue());
   else
     notification_queue_.reset();
 }
 
 }  // namespace message_center