Add a skeleton gamepad resource.

ppapi/proxy/gamepad_resource.h

+// Copyright (c) 2012 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 PPAPI_PROXY_GAMEPAD_RESOURCE_H_
+#define PPAPI_PROXY_GAMEPAD_RESOURCE_H_
+
+#include "base/basictypes.h"
+#include "base/compiler_specific.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/shared_memory.h"
+#include "ppapi/proxy/plugin_resource.h"
+#include "ppapi/proxy/ppapi_proxy_export.h"
+#include "ppapi/thunk/ppb_gamepad_api.h"
+
+struct PP_GamepadsSampleData;
+
+namespace base {
+class SharedMemory;
+}
+
+namespace ppapi {
+namespace proxy {
+
+// This class is a bit weird. It isn't a true resource from the plugin's
+// perspective. But we need to make requests to the browser and get replies.
+// It's more convenient to do this as a resource, so the instance just
+// maintains an internal lazily instantiated copy of this resource.
+class PPAPI_PROXY_EXPORT GamepadResource
+      : public PluginResource,
+        public thunk::PPB_Gamepad_API {
+ public:
+  GamepadResource(Connection connection, PP_Instance instance);
+  virtual ~GamepadResource();
+
+  // PPB_Gamepad_API.
+  virtual void Sample(PP_GamepadsSampleData* data) OVERRIDE;
+
+ private:
+  // PluginResource override.
+  virtual void OnReplyReceived(const ResourceMessageReplyParams& params,
+                               const IPC::Message& msg) OVERRIDE;
+
+  void OnPluginMsgSendMemory(const ResourceMessageReplyParams& params,
+                             base::SharedMemoryHandle shared_memory_handle);
+
+  scoped_ptr<base::SharedMemory> shared_memory_;
+  void* buffer_;
+
+  DISALLOW_COPY_AND_ASSIGN(GamepadResource);
+};
+
+}  // namespace proxy
+}  // namespace ppapi
+
+#endif  // PPAPI_PROXY_GAMEPAD_RESOURCE_H_