Add some empty classes for the embedded SharedWorker.

content/browser/worker_host/shared_worker_message_filter.cc

Index: content/browser/worker_host/shared_worker_message_filter.cc
diff --git a/content/browser/worker_host/shared_worker_message_filter.cc b/content/browser/worker_host/shared_worker_message_filter.cc
new file mode 100644
index 0000000000000000000000000000000000000000..61a0ecb3366ee68e178e7bd0c85268ee8ea2573b
--- /dev/null
+++ b/content/browser/worker_host/shared_worker_message_filter.cc
@@ -0,0 +1,39 @@
+// 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/browser/worker_host/shared_worker_message_filter.h"
+
+#include "content/browser/devtools/worker_devtools_manager.h"
+#include "content/browser/message_port_message_filter.h"
+#include "content/browser/worker_host/shared_worker_service_impl.h"
+#include "content/common/devtools_messages.h"
+#include "content/common/view_messages.h"
+#include "content/common/worker_messages.h"
+
+
+namespace content {
+
+SharedWorkerMessageFilter::SharedWorkerMessageFilter(
+    int render_process_id,
+    ResourceContext* resource_context,
+    const WorkerStoragePartition& partition,
+    MessagePortMessageFilter* message_port_message_filter) {
+  DCHECK(resource_context);
+}
+
+SharedWorkerMessageFilter::~SharedWorkerMessageFilter() {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
+}
+
+void SharedWorkerMessageFilter::OnChannelClosing() {
+  // TODO(horo): implement this.
+}
+
+bool SharedWorkerMessageFilter::OnMessageReceived(const IPC::Message& message,
+                                                  bool* message_was_ok) {
+  // TODO(horo): implement this.
+  return false;
+}
+
+}  // namespace content