Add IPC benchmarking API to Blink TestRunner

content/shell/browser/ipc_echo_message_filter.h

Index: content/shell/browser/ipc_echo_message_filter.h
diff --git a/content/shell/browser/ipc_echo_message_filter.h b/content/shell/browser/ipc_echo_message_filter.h
new file mode 100644
index 0000000000000000000000000000000000000000..1d1e48931edf303ff8d860ca086400852fc55d6e
--- /dev/null
+++ b/content/shell/browser/ipc_echo_message_filter.h
@@ -0,0 +1,31 @@
+// 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_SHELL_BROWSER_IPC_ECHO_MESSAGE_FILTER_H_
+#define CONTENT_SHELL_BROWSER_IPC_ECHO_MESSAGE_FILTER_H_
+
+#include <string>
+
+#include "content/public/browser/browser_message_filter.h"
+
+namespace content {
+
+class IPCEchoMessageFilter : public BrowserMessageFilter {
+ public:
+  IPCEchoMessageFilter();
+
+ private:
+  virtual ~IPCEchoMessageFilter();
+
+  // BrowserMessageFilter implementation.
+  virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
+
+  void OnEchoPing(int routing_id, int id, const std::string& body);
+
+  DISALLOW_COPY_AND_ASSIGN(IPCEchoMessageFilter);
+};
+
+}  // namespace content
+
+#endif // CONTENT_SHELL_BROWSER_IPC_ECHO_MESSAGE_FILTER_H_