Retrieve pinned flag directly from Notification class

ui/message_center/views/message_list_view.cc

 // Copyright (c) 2015 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 <algorithm>
 
 #include "base/command_line.h"
 #include "base/location.h"
 #include "base/single_thread_task_runner.h"
 #include "base/threading/thread_task_runner_handle.h"
@@ skipping 243 matching lines @@
 
 void MessageListView::ClearAllClosableNotifications(
     const gfx::Rect& visible_scroll_rect) {
   for (int i = 0; i < child_count(); ++i) {
     // Safe cast since all views in MessageListView are MessageViews.
     MessageView* child = (MessageView*)child_at(i);
     if (!child->visible())
       continue;
     if (gfx::IntersectRects(child->bounds(), visible_scroll_rect).IsEmpty())
       continue;
-    if (child->IsPinned())
+    if (child->pinned())
       continue;
     if (deleting_views_.find(child) != deleting_views_.end() ||
         deleted_when_done_.find(child) != deleted_when_done_.end()) {
       // We don't check clearing_all_views_ here, so this can lead to a
       // notification being deleted twice. Even if we do check it, there is a
       // problem similar to the problem in RemoveNotification(), it could be
       // currently in its animation before removal, and we could similarly
       // delete it twice. This is a bug.
       continue;
     }
@@ skipping 291 matching lines @@
         base::TimeDelta::FromMilliseconds(
             kAnimateClearingNextNotificationDelayMS));
   }
 }
 
 void MessageListView::SetRepositionTargetForTest(const gfx::Rect& target_rect) {
   SetRepositionTarget(target_rect);
 }
 
 }  // namespace message_center