Refactor Web Notification permission requests.

content/renderer/notification_permission_dispatcher.cc

+// 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.
+
+#include "content/renderer/notification_permission_dispatcher.h"
+
+#include "content/common/platform_notification_messages.h"
+#include "third_party/WebKit/public/platform/WebString.h"
+#include "third_party/WebKit/public/web/WebNotificationPermissionCallback.h"
+#include "third_party/WebKit/public/web/WebSecurityOrigin.h"
+#include "url/gurl.h"
+
+namespace content {
+
+NotificationPermissionDispatcher::NotificationPermissionDispatcher(
+    RenderFrame* render_frame) : RenderFrameObserver(render_frame) {
+}
+
+NotificationPermissionDispatcher::~NotificationPermissionDispatcher() {
+}
+
+void NotificationPermissionDispatcher::RequestPermission(
+    const blink::WebSecurityOrigin& origin,
+    blink::WebNotificationPermissionCallback* callback) {
+  int request_id = pending_requests_.Add(callback);
+  Send(new PlatformNotificationHostMsg_RequestPermission(
+      routing_id(), GURL(origin.toString()), request_id));
+}
+
+bool NotificationPermissionDispatcher::OnMessageReceived(
+    const IPC::Message& message) {
+  bool handled = true;
+  IPC_BEGIN_MESSAGE_MAP(NotificationPermissionDispatcher, message)
+    IPC_MESSAGE_HANDLER(PlatformNotificationMsg_PermissionRequestComplete,
+                        OnPermissionRequestComplete);
+    IPC_MESSAGE_UNHANDLED(handled = false)
+  IPC_END_MESSAGE_MAP()
+
+  return handled;
+}
+
+void NotificationPermissionDispatcher::OnPermissionRequestComplete(
+    int request_id, blink::WebNotificationPermission result) {
+  blink::WebNotificationPermissionCallback* callback =
+      pending_requests_.Lookup(request_id);
+  DCHECK(callback);
+
+  callback->permissionRequestComplete(result);
+  pending_requests_.Remove(request_id);
+}
+
+}  // namespace content