renderer: implement multiple permission requesting

content/browser/permissions/permission_pending_single_request.cc

+// 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 "content/browser/permissions/permission_pending_single_request.h"
+
+#include "base/callback.h"
+#include "content/public/browser/permission_manager.h"
+#include "content/public/browser/permission_type.h"
+
+namespace content {
+
+PermissionPendingSingleRequest::PermissionPendingSingleRequest(
+    PermissionType permission,
+    const GURL& origin,
+    const PermissionStatusCallback& callback)
+    : callback(callback),
+      permission(permission),
+      origin(origin) {
+}
+
+PermissionPendingSingleRequest::~PermissionPendingSingleRequest() {
+  if (!callback.is_null())
+    callback.Run(PERMISSION_STATUS_ASK);
+}
+
+void PermissionPendingSingleRequest::Cancel(
+    PermissionManager* permission_manager,
+    RenderFrameHost* context,
+    int request_id) {
+  permission_manager->CancelPermissionRequest(permission, context,
+      request_id, origin);
+}
+
+} // namespace content