Use MacViews for ContentSettingBubbles.

chrome/browser/ui/views/browser_dialogs_views_mac.cc

 // Copyright 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 <utility>
 
 #include "chrome/browser/ui/bookmarks/bookmark_bubble_sign_in_delegate.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_dialogs.h"
 #include "chrome/browser/ui/views/bookmarks/bookmark_bubble_view.h"
+#include "chrome/browser/ui/views/content_setting_bubble_contents.h"
 #include "chrome/browser/ui/views/website_settings/website_settings_popup_view.h"
 
 // This file provides definitions of desktop browser dialog-creation methods for
 // Mac where a Cocoa browser is using Views dialogs. I.e. it is included in the
 // Cocoa build and definitions under chrome/browser/ui/cocoa may select at
 // runtime whether to show a Cocoa dialog, or the toolkit-views dialog defined
 // here (declared in browser_dialogs.h).
 
 namespace chrome {
 
@@ skipping 16 matching lines @@
                                     bool already_bookmarked) {
   // The Views dialog may prompt for sign in.
   scoped_ptr<BubbleSyncPromoDelegate> delegate(
       new BookmarkBubbleSignInDelegate(browser));
 
   BookmarkBubbleView::ShowBubble(nullptr, gfx::Rect(anchor_point, gfx::Size()),
                                  parent, observer, std::move(delegate),
                                  browser->profile(), url, already_bookmarked);
 }
 
+void ContentSettingBubbleViewsBridge::Show(gfx::NativeView parent_view,
+                                           ContentSettingBubbleModel* model,
+                                           content::WebContents* web_contents,
+                                           const gfx::Point& anchor) {
+  ContentSettingBubbleContents* contents =
+      new ContentSettingBubbleContents(model, web_contents, nullptr,
+          views::BubbleBorder::Arrow::TOP_RIGHT);
+  contents->set_parent_window(parent_view);
+  contents->SetAnchorRect(gfx::Rect(anchor, gfx::Size()));

[msw, 2016/01/13 18:13:05]

fyi: using an empty size here means that if the bubble needs to flip vertically,
then the arrow will overlap the icon that it's anchored beneath.

+  views::BubbleDelegateView::CreateBubble(contents)->Show();
+}
+
 }  // namespace chrome