New thunk system for Pepper proxy and implementation

ppapi/thunk/thunk.h

+// Copyright (c) 2011 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_THUNK_H_
+#define PPAPI_THUNK_THUNK_H_
+
+#include "base/synchronization/lock.h"
+#include "ppapi/internal/ppapi_internal.h"
+
+struct PPB_Graphics2D;
+struct PPB_ImageData;
+
+namespace ppapi {
+namespace thunk {
+
+const PPB_Graphics2D* GetPPB_Graphics2D_Thunk();
+const PPB_ImageData* GetPPB_ImageData_Thunk();
+
+}  // namespace thunk
+}  // namespace ppapi
+
+#endif  // PPAPI_THUNK_THUNK_H_
+
+