Apps V2 in Pepper: introduce singleton resource ExtensionsCommon.

ppapi/thunk/extensions_common_api.h

+// Copyright (c) 2013 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_THUNK_EXTENSIONS_COMMON_API_H_
+#define PPAPI_THUNK_EXTENSIONS_COMMON_API_H_
+
+#include <string>
+#include <vector>
+
+#include "base/memory/ref_counted.h"
+#include "ppapi/c/pp_var.h"
+#include "ppapi/shared_impl/singleton_resource_id.h"
+#include "ppapi/shared_impl/tracked_callback.h"
+#include "ppapi/thunk/ppapi_thunk_export.h"
+
+namespace ppapi {
+namespace thunk {
+
+class PPAPI_THUNK_EXPORT ExtensionsCommon_API {
+ public:
+  virtual ~ExtensionsCommon_API() {}
+
+  virtual int32_t Call(const std::string& request_name,
+                       const std::vector<PP_Var>& input_args,
+                       const std::vector<PP_Var*>& output_args,
+                       scoped_refptr<TrackedCallback> callback) = 0;
+  virtual void Post(const std::string& request_name,
+                    const std::vector<PP_Var>& args) = 0;
+
+  static const SingletonResourceID kSingletonResourceID =
+      EXTENSIONS_COMMON_SINGLETON_ID;
+};
+
+}  // namespace thunk
+}  // namespace ppapi
+
+#endif // PPAPI_THUNK_EXTENSIONS_COMMON_API_H_