Gamepad API: add support for connection events

content/common/gamepad_param_traits.h

+// Copyright (c) 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_COMMON_GAMEPAD_PARAM_TRAITS_H_
+#define CONTENT_COMMON_GAMEPAD_PARAM_TRAITS_H_
+
+#include <string>
+
+#include "ipc/ipc_param_traits.h"
+
+class PickleIterator;
+
+namespace blink { class WebGamepad; }
+
+namespace IPC {
+
+class Message;
+
+template <>
+struct ParamTraits<blink::WebGamepad> {
+  typedef blink::WebGamepad param_type;
+  static void Write(Message* m, const blink::WebGamepad& p);
+  static bool Read(const Message* m,
+                   PickleIterator* iter,
+                   blink::WebGamepad* p);
+  static void Log(const blink::WebGamepad& p, std::string* l);
+};
+
+} // namespace IPC
+
+#endif