Implement WebPushProvider.unregister() in Chromium.

content/common/push_messaging_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.
 
 // IPC messages for push messaging.
 // Multiply-included message file, hence no include guard.
 
 #include "content/public/common/push_messaging_status.h"
 #include "ipc/ipc_message_macros.h"
+#include "third_party/WebKit/public/platform/WebPushError.h"
 #include "third_party/WebKit/public/platform/WebPushPermissionStatus.h"
 #include "url/gurl.h"
 
 #define IPC_MESSAGE_START PushMessagingMsgStart
 
 IPC_ENUM_TRAITS_MAX_VALUE(content::PushRegistrationStatus,
                           content::PUSH_REGISTRATION_STATUS_LAST)
 
 IPC_ENUM_TRAITS_MAX_VALUE(
     blink::WebPushPermissionStatus,
     blink::WebPushPermissionStatus::WebPushPermissionStatusLast)
 
+IPC_ENUM_TRAITS_MAX_VALUE(
+    blink::WebPushError::ErrorType,
+    blink::WebPushError::ErrorType::ErrorTypeLast)
+
 // Messages sent from the browser to the child process.
 
 IPC_MESSAGE_ROUTED3(PushMessagingMsg_RegisterFromDocumentSuccess,
                     int32 /* request_id */,
                     GURL /* push_endpoint */,
                     std::string /* push_registration_id */)
 
 IPC_MESSAGE_CONTROL3(PushMessagingMsg_RegisterFromWorkerSuccess,
                      int32 /* request_id */,
                      GURL /* push_endpoint */,
@@ skipping 16 matching lines @@
                      int32 /* request_id */,
                      blink::WebPushPermissionStatus /* status */)
 
 // TODO(mvanouwerkerk): Delete this after switching to the platform code path.
 IPC_MESSAGE_ROUTED1(PushMessagingMsg_PermissionStatusFailure,
                     int32 /* callback_id */)
 
 IPC_MESSAGE_CONTROL1(PushMessagingMsg_GetPermissionStatusError,
                      int32 /* request_id */)
 
+IPC_MESSAGE_CONTROL2(PushMessagingMsg_UnregisterSuccess,
+                     int32 /* request_id */,
+                     bool /* did_unregister */)
+
+IPC_MESSAGE_CONTROL3(PushMessagingMsg_UnregisterError,
+                     int32 /* request_id */,
+                     blink::WebPushError::ErrorType /* error_type */,
+                     std::string /* error_message */)
+
 // Messages sent from the child process to the browser.
 
 // TODO(mvanouwerkerk): Delete this when it is no longer used.
 IPC_MESSAGE_CONTROL5(PushMessagingHostMsg_RegisterFromDocumentOld,
                      int32 /* render_frame_id */,
                      int32 /* request_id */,
                      std::string /* sender_id */,
                      bool /* user_visible_only */,
                      int32 /* service_worker_provider_id */)
 
@@ skipping 10 matching lines @@
 
 // TODO(mvanouwerkerk): Delete this after switching to the platform code path.
 IPC_MESSAGE_CONTROL3(PushMessagingHostMsg_PermissionStatus,
                      int32 /* render_frame_id */,
                      int32 /* service_worker_provider_id */,
                      int32 /* permission_callback_id */)
 
 IPC_MESSAGE_CONTROL2(PushMessagingHostMsg_GetPermissionStatus,
                      int32 /* request_id */,
                      int64 /* service_worker_registration_id */)
+
+IPC_MESSAGE_CONTROL2(PushMessagingHostMsg_Unregister,
+                     int32 /* request_id */,
+                     int64 /* service_worker_registration_id */)