Add some empty classes for the embedded SharedWorker.

content/browser/worker_host/shared_worker_message_filter.h

Index: content/browser/worker_host/shared_worker_message_filter.h
diff --git a/content/browser/worker_host/shared_worker_message_filter.h b/content/browser/worker_host/shared_worker_message_filter.h
new file mode 100644
index 0000000000000000000000000000000000000000..5c70a70755cf4316d1b2f74b6810b77d58bac848
--- /dev/null
+++ b/content/browser/worker_host/shared_worker_message_filter.h
@@ -0,0 +1,43 @@
+// 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 CONTENT_BROWSER_WORKER_HOST_SHARED_WORKER_MESSAGE_FILTER_H_
+#define CONTENT_BROWSER_WORKER_HOST_SHARED_WORKER_MESSAGE_FILTER_H_
+
+#include "base/callback.h"
+#include "content/browser/worker_host/worker_storage_partition.h"
+#include "content/public/browser/browser_message_filter.h"
+#include "url/gurl.h"
+
+class ResourceDispatcherHost;
+struct ViewHostMsg_CreateWorker_Params;
+
+namespace content {
+class MessagePortMessageFilter;
+class ResourceContext;
+
+// If "enable-embedded-shared-worker" is set this class will be used in stead of
+// WorkerMessageFilter.
+// TODO(horo): implement this class.
+class SharedWorkerMessageFilter : public BrowserMessageFilter {
+ public:
+  SharedWorkerMessageFilter(int render_process_id,
+                            ResourceContext* resource_context,
+                            const WorkerStoragePartition& partition,
+                            MessagePortMessageFilter* message_port_filter);
+
+  // BrowserMessageFilter implementation.
+  virtual void OnChannelClosing() OVERRIDE;
+  virtual bool OnMessageReceived(const IPC::Message& message,
+                                 bool* message_was_ok) OVERRIDE;
+
+ private:
+  virtual ~SharedWorkerMessageFilter();
+
+  DISALLOW_IMPLICIT_CONSTRUCTORS(SharedWorkerMessageFilter);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_WORKER_HOST_SHARED_WORKER_MESSAGE_FILTER_H_