Add support for native extension notifications

chrome/browser/notifications/notification_platform_bridge_mac.mm

 // 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 "chrome/browser/notifications/notification_platform_bridge_mac.h"
 
 #include <utility>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
@@ skipping 154 matching lines @@
   base::scoped_nsobject<NotificationBuilder> builder(
       [[NotificationBuilder alloc]
       initWithCloseLabel:l10n_util::GetNSString(IDS_NOTIFICATION_BUTTON_CLOSE)
             optionsLabel:l10n_util::GetNSString(IDS_NOTIFICATION_BUTTON_MORE)
            settingsLabel:l10n_util::GetNSString(
                              IDS_NOTIFICATION_BUTTON_SETTINGS)]);
 
   [builder setTitle:base::SysUTF16ToNSString(notification.title())];
   [builder setContextMessage:base::SysUTF16ToNSString(notification.message())];
 
+  bool requires_attribution =
+      notification.context_message().empty() &&
+      notification_type != NotificationCommon::EXTENSION;
+
   base::string16 subtitle =
-      notification.context_message().empty()
+      requires_attribution
           ? url_formatter::FormatOriginForSecurityDisplay(
                 url::Origin(notification.origin_url()),
                 url_formatter::SchemeDisplay::OMIT_HTTP_AND_HTTPS)
           : notification.context_message();
 
   [builder setSubTitle:base::SysUTF16ToNSString(subtitle)];
   if (!notification.icon().IsEmpty()) {
     [builder setIcon:notification.icon().ToNSImage()];
   }
 
+  [builder setShowSettingsButton:(notification_type !=
+                                  NotificationCommon::EXTENSION)];
   std::vector<message_center::ButtonInfo> buttons = notification.buttons();
   if (!buttons.empty()) {
     DCHECK_LE(buttons.size(), blink::kWebNotificationMaxActions);
     NSString* buttonOne = SysUTF16ToNSString(buttons[0].title);
     NSString* buttonTwo = nullptr;
     if (buttons.size() > 1)
       buttonTwo = SysUTF16ToNSString(buttons[1].title);
     [builder setButtons:buttonOne secondaryButton:buttonTwo];
   }
 
@@ skipping 332 matching lines @@
     base::scoped_nsobject<CrXPCMachPort> xpcPort(
         [[CrXPCMachPort alloc] initWithMachSendRight:std::move(exceptionPort)]);
     [proxy setMachExceptionPort:xpcPort];
     setExceptionPort_ = YES;
   }
 
   return proxy;
 }
 
 @end