Retrieve pinned flag directly from Notification class

ui/message_center/views/custom_notification_view_unittest.cc

 // Copyright 2016 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 <memory>
 
 #include "base/macros.h"
 #include "base/memory/ptr_util.h"
 #include "base/memory/ref_counted.h"
 #include "base/strings/utf_string_conversions.h"
@@ skipping 73 matching lines @@
   int keyboard_event_count_ = 0;
   gfx::Size preferred_size_ = gfx::Size(100, 100);
 
   DISALLOW_COPY_AND_ASSIGN(TestCustomView);
 };
 
 class TestContentViewDelegate : public CustomNotificationContentViewDelegate {
  public:
   bool IsCloseButtonFocused() const override { return false; }
   void RequestFocusOnCloseButton() override {}
-  bool IsPinned() const override { return false; }
   void UpdateControlButtonsVisibility() override {}
 };
 
 class TestNotificationDelegate : public NotificationDelegate {
  public:
   TestNotificationDelegate() {}
 
   // NotificateDelegate
   std::unique_ptr<CustomContent> CreateCustomContent() override {
     return base::MakeUnique<CustomContent>(
@@ skipping 286 matching lines @@
   EXPECT_EQ("360x10", size.ToString());
 
   // The long notification.
   custom_view()->set_preferred_size(gfx::Size(1000, 1000));
   size = notification_view()->GetPreferredSize();
   size.Enlarge(0, -notification_view()->GetInsets().height());
   EXPECT_EQ("360x1000", size.ToString());
 }
 
 }  // namespace message_center