Implement getting notifications up to the browser process.

content/common/platform_notification_messages.h

 // Copyright 2014 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.
 
 // Messages for platform-native notifications using the Web Notification API.
 // Multiply-included message file, hence no include guard.
 
+#include <stdint.h>
+#include <string>
+#include <utility>
+#include <vector>
+
 #include "content/public/common/platform_notification_data.h"
 #include "ipc/ipc_message_macros.h"
 #include "third_party/WebKit/public/platform/modules/notifications/WebNotificationPermission.h"
 #include "third_party/skia/include/core/SkBitmap.h"
 
 #define IPC_MESSAGE_START PlatformNotificationMsgStart
 
 IPC_ENUM_TRAITS_MAX_VALUE(blink::WebNotificationPermission,
                           blink::WebNotificationPermissionLast)
 
 IPC_ENUM_TRAITS_MAX_VALUE(
     content::PlatformNotificationData::NotificationDirection,
     content::PlatformNotificationData::NotificationDirectionLast)
 
 IPC_STRUCT_TRAITS_BEGIN(content::PlatformNotificationData)
   IPC_STRUCT_TRAITS_MEMBER(title)
   IPC_STRUCT_TRAITS_MEMBER(direction)
   IPC_STRUCT_TRAITS_MEMBER(lang)
   IPC_STRUCT_TRAITS_MEMBER(body)
   IPC_STRUCT_TRAITS_MEMBER(tag)
   IPC_STRUCT_TRAITS_MEMBER(icon)
   IPC_STRUCT_TRAITS_MEMBER(silent)
 IPC_STRUCT_TRAITS_END()
 
+// Defines the pair of [persistent notification id] => [notification data] used
+// when getting the notifications for a given Service Worker registration.
+using PersistentNotificationInfo =

[Tom Sepez, 2015/03/17 21:32:38]

This will have to move to an include guarded section of the file to prevent the
compiler seeing it multiple times as code is generated. See something like
https://code.google.com/p/chromium/codesearch#chromium/src/content/common/geo...
for an example of how to structure this section.

[Peter Beverloo, 2015/03/19 15:46:44]

Done.

+    std::pair<std::string, content::PlatformNotificationData>;
+
 // Messages sent from the browser to the renderer.
 
 // Informs the renderer that the browser has displayed the notification.
 IPC_MESSAGE_CONTROL1(PlatformNotificationMsg_DidShow,
                      int /* notification_id */)
 
 // Informs the renderer that the notification has been closed.
 IPC_MESSAGE_CONTROL1(PlatformNotificationMsg_DidClose,
                      int /* notification_id */)
 
 // Informs the renderer that the notification has been clicked on.
 IPC_MESSAGE_CONTROL1(PlatformNotificationMsg_DidClick,
                      int /* notification_id */)
 
+// Informs the renderer about a vector of available notifications in response

[Tom Sepez, 2015/03/17 21:32:38]

nit: this comment might indicate 
"reply to PlatformNotificationHostMsg_GetNotifications" if that's the case.

[Peter Beverloo, 2015/03/19 15:46:44]

Done.

+// to a request to get all persistent notifications for a Service Worker.
+IPC_MESSAGE_CONTROL2(PlatformNotificationMsg_DidGetNotifications,
+                     int /* request_id */,
+                     std::vector<PersistentNotificationInfo>
+                         /* notifications */)
+
 // Messages sent from the renderer to the browser.
 
 IPC_MESSAGE_CONTROL4(PlatformNotificationHostMsg_Show,
                      int /* notification_id */,
                      GURL /* origin */,
                      SkBitmap /* icon */,
                      content::PlatformNotificationData /* notification_data */)
 
 IPC_MESSAGE_CONTROL4(PlatformNotificationHostMsg_ShowPersistent,
-                     int64 /* service_worker_provider_id */,
+                     int64_t /* service_worker_registration_id */,
                      GURL /* origin */,
                      SkBitmap /* icon */,
                      content::PlatformNotificationData /* notification_data */)
 
+IPC_MESSAGE_CONTROL4(PlatformNotificationHostMsg_GetNotifications,
+                     int /* request_id */,
+                     int64_t /* service_worker_registration_id */,
+                     GURL /* origin */,
+                     std::string /* filter_tag */)
+
 IPC_MESSAGE_CONTROL1(PlatformNotificationHostMsg_Close,
                      int /* notification_id */)
 
 IPC_MESSAGE_CONTROL2(PlatformNotificationHostMsg_ClosePersistent,
                      GURL /* origin */,
                      std::string /* persistent_notification_id */)
 
 IPC_SYNC_MESSAGE_CONTROL1_1(PlatformNotificationHostMsg_CheckPermission,
                             GURL /* origin */,
                             blink::WebNotificationPermission /* result */)