Add IPC stubs between browser and ServiceWorker's worker context in the child process

content/common/service_worker_types.cc

Index: content/common/service_worker_types.cc
diff --git a/content/common/service_worker_types.cc b/content/common/service_worker_types.cc
new file mode 100644
index 0000000000000000000000000000000000000000..c4567520f32b714041bd7df28830a21d721e656d
--- /dev/null
+++ b/content/common/service_worker_types.cc
@@ -0,0 +1,22 @@
+// Copyright 2013 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/common/service_worker_types.h"
+
+namespace content {
+
+ServiceWorkerFetchRequest::ServiceWorkerFetchRequest() {}
+
+ServiceWorkerFetchRequest::ServiceWorkerFetchRequest(
+    const GURL& url,
+    const std::string& method,
+    const std::map<std::string, std::string>& headers)
+    : url(url),
+      method(method),
+      headers(headers) {
+}
+
+ServiceWorkerFetchRequest::~ServiceWorkerFetchRequest() {}
+
+}  // namespace content