Converted PluginResource reply message handling to use base::Callback

ppapi/proxy/plugin_resource_callback.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_PLUGIN_RESOURCE_CALLBACK_H_
+#define PPAPI_PROXY_PLUGIN_RESOURCE_CALLBACK_H_
+
+#include "base/memory/ref_counted.h"
+#include "ipc/ipc_message.h"
+#include "ppapi/proxy/dispatch_reply_message.h"
+#include "ppapi/proxy/resource_message_params.h"
+
+namespace ppapi {
+namespace proxy {
+
+// |PluginResourceCallback| wraps a |base::Callback| on the plugin side which
+// will be triggered in response to a particular message type being received.
+// |MsgClass| is the reply message type that the callback will be called with
+// and |CallbackType| is the type of the |base::Callback| that will be called.
+class PluginResourceCallbackBase
+    : public base::RefCounted<PluginResourceCallbackBase> {
+ public:
+  virtual void Run(const ResourceMessageReplyParams& params,
+                   const IPC::Message& msg) = 0;
+ protected:
+  friend class base::RefCounted<PluginResourceCallbackBase>;
+  virtual ~PluginResourceCallbackBase() {}
+};
+
+template<typename MsgClass, typename CallbackType>
+class PluginResourceCallback : public PluginResourceCallbackBase {
+ public:
+  explicit PluginResourceCallback(const CallbackType& callback)
+      : callback_(callback) {}
+
+  virtual void Run(
+      const ResourceMessageReplyParams& reply_params,
+      const IPC::Message& msg) OVERRIDE {
+    DispatchResourceReplyOrDefaultParams<MsgClass>(
+        &callback_, &CallbackType::Run, reply_params, msg);
+  }
+
+ private:
+  virtual ~PluginResourceCallback() {}
+
+  CallbackType callback_;
+};
+
+}  // namespace proxy
+}  // namespace ppapi
+
+#endif  // PPAPI_PROXY_PLUGIN_RESOURCE_CALLBACK_H_