Use MacViews for ContentSettingBubbles.

chrome/browser/ui/views/browser_dialogs_views_mac.cc

Index: chrome/browser/ui/views/browser_dialogs_views_mac.cc
diff --git a/chrome/browser/ui/views/browser_dialogs_views_mac.cc b/chrome/browser/ui/views/browser_dialogs_views_mac.cc
index 68ab357bcb16156b2275e5ab62709ae720581bd6..7254c458d22c69d0909d423cb5bb0b8872427b98 100644
--- a/chrome/browser/ui/views/browser_dialogs_views_mac.cc
+++ b/chrome/browser/ui/views/browser_dialogs_views_mac.cc
@@ -8,6 +8,7 @@
 #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
@@ -44,4 +45,16 @@ void ShowBookmarkBubbleViewsAtPoint(const gfx::Point& anchor_point,
                                  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