Implement WebPushProvider.unregister() in Chromium.

content/browser/push_messaging/push_messaging_message_filter.cc

Index: content/browser/push_messaging/push_messaging_message_filter.cc
diff --git a/content/browser/push_messaging/push_messaging_message_filter.cc b/content/browser/push_messaging/push_messaging_message_filter.cc
index cf0a1f4e335ad8de347c0fbb2da1a28050bef361..7d256733aae94d498fd5980ca85cf7c3478b7456 100644
--- a/content/browser/push_messaging/push_messaging_message_filter.cc
+++ b/content/browser/push_messaging/push_messaging_message_filter.cc
@@ -74,6 +74,8 @@ bool PushMessagingMessageFilter::OnMessageReceived(
                         OnPermissionStatusRequest)
     IPC_MESSAGE_HANDLER(PushMessagingHostMsg_GetPermissionStatus,
                         OnGetPermissionStatus)
+    IPC_MESSAGE_HANDLER(PushMessagingHostMsg_Unregister,
+                        OnUnregister)
     IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
   return handled;
@@ -265,6 +267,45 @@ void PushMessagingMessageFilter::RegisterOnUI(
   }
 }
 
+void PushMessagingMessageFilter::OnUnregister(
+    int request_id, int64 service_worker_registration_id) {
+    DCHECK_CURRENTLY_ON(BrowserThread::IO);
+  ServiceWorkerRegistration* service_worker_registration =
+      service_worker_context_->context()->GetLiveRegistration(
+          service_worker_registration_id);
+  DCHECK(service_worker_registration);
+  if (!service_worker_registration)
+    return;
+
+  BrowserThread::PostTask(
+      BrowserThread::UI, FROM_HERE,
+      base::Bind(&PushMessagingMessageFilter::UnregisterOnUI,
+                 this,
+                 request_id,
+                 service_worker_registration_id,
+                 service_worker_registration->pattern().GetOrigin()));
+}
+
+void PushMessagingMessageFilter::UnregisterOnUI(
+    int request_id,
+    int64 service_worker_registration_id,
+    const GURL& requesting_origin) {
+  DCHECK_CURRENTLY_ON(BrowserThread::UI);
+  if (!service()) {
+    DidUnregister(request_id, false);
+    return;
+  }
+
+  service()->Unregister(requesting_origin, service_worker_registration_id,
+      base::Bind(&PushMessagingMessageFilter::DidUnregister,
+                 weak_factory_ui_to_ui_.GetWeakPtr(), request_id));
+}
+
+void PushMessagingMessageFilter::DidUnregister(int request_id,
+                                               bool unregistered) {
+  Send(new PushMessagingMsg_UnregisterResponse(request_id, unregistered));
+}
+
 void PushMessagingMessageFilter::DoPermissionStatusRequest(
     const GURL& requesting_origin,
     int render_frame_id,