Use MacViews for ContentSettingBubbles.

chrome/browser/ui/cocoa/location_bar/location_bar_view_mac.h

 // 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.
 
 #ifndef CHROME_BROWSER_UI_COCOA_LOCATION_BAR_LOCATION_BAR_VIEW_MAC_H_
 #define CHROME_BROWSER_UI_COCOA_LOCATION_BAR_LOCATION_BAR_VIEW_MAC_H_
 
 #include <string>
 
 #import <Cocoa/Cocoa.h>
@@ skipping 10 matching lines @@
 #include "chrome/browser/ui/omnibox/chrome_omnibox_edit_controller.h"
 #include "components/content_settings/core/common/content_settings_types.h"
 #include "components/ui/zoom/zoom_event_manager_observer.h"
 
 @class AutocompleteTextField;
 class CommandUpdater;
 class ContentSettingDecoration;
 class EVBubbleDecoration;
 class KeywordHintDecoration;
 class LocationBarDecoration;
+class LocationBarViewDecoration;
 class LocationIconDecoration;
 class ManagePasswordsDecoration;
 class PageActionDecoration;
 class Profile;
 class SaveCreditCardDecoration;
 class SelectedKeywordDecoration;
 class StarDecoration;
 class TranslateDecoration;
 class ZoomDecoration;
 class ZoomDecorationTest;
@@ skipping 191 matching lines @@
   // A decoration that shows a lock icon and ev-cert label in a bubble
   // on the left.
   scoped_ptr<EVBubbleDecoration> ev_bubble_decoration_;
 
   // Save credit card icon on the right side of the omnibox.
   scoped_ptr<SaveCreditCardDecoration> save_credit_card_decoration_;
 
   // Bookmark star right of page actions.
   scoped_ptr<StarDecoration> star_decoration_;
 
+  scoped_ptr<LocationBarViewDecoration> test_decoration_;

[tapted, 2016/01/11 02:50:58]

Is this bit used?

+
   // Translate icon at the end of the ominibox.
   scoped_ptr<TranslateDecoration> translate_decoration_;
 
   // A zoom icon at the end of the omnibox, which shows at non-standard zoom
   // levels.
   scoped_ptr<ZoomDecoration> zoom_decoration_;
 
   // Decorations for the installed Page Actions.
   ScopedVector<PageActionDecoration> page_action_decorations_;
 
@@ skipping 14 matching lines @@
   // Indicates whether or not the location bar is currently visible.
   bool location_bar_visible_;
 
   // Used to schedule a task for the first run info bubble.
   base::WeakPtrFactory<LocationBarViewMac> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(LocationBarViewMac);
 };
 
 #endif  // CHROME_BROWSER_UI_COCOA_LOCATION_BAR_LOCATION_BAR_VIEW_MAC_H_