ServiceWorker: Add support for .skipWaiting and controllerchange event(1/3)

public/platform/WebServiceWorkerSkipWaitingCallbacks.h

Index: public/platform/WebServiceWorkerSkipWaitingCallbacks.h
diff --git a/public/platform/WebServiceWorkerSkipWaitingCallbacks.h b/public/platform/WebServiceWorkerSkipWaitingCallbacks.h
new file mode 100644
index 0000000000000000000000000000000000000000..3483603c144d79565f9a93dd4f6531be7fa1370b
--- /dev/null
+++ b/public/platform/WebServiceWorkerSkipWaitingCallbacks.h
@@ -0,0 +1,16 @@
+// 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.
+
+#ifndef WebServiceWorkerSkipWaitingCallbacks_h
+#define WebServiceWorkerSkipWaitingCallbacks_h
+
+#include "public/platform/WebCallbacks.h"
+
+namespace blink {
+
+using WebServiceWorkerSkipWaitingCallbacks = WebCallbacks<void, void>;
+
+} // namespace blink
+
+#endif // WebServiceWorkerSkipWaitingCallbacks_h