Cloning a bunch of stuff from the native_client repository at r6528

ppapi/native_client/src/shared/ppapi_proxy/plugin_ppb_var.h

+// Copyright (c) 2011 The Native Client 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 NATIVE_CLIENT_SRC_SHARED_PPAPI_PROXY_PLUGIN_VAR_H_
+#define NATIVE_CLIENT_SRC_SHARED_PPAPI_PROXY_PLUGIN_VAR_H_
+
+#include <string>
+
+#include "native_client/src/include/nacl_macros.h"
+#include "native_client/src/include/portability.h"
+#include "ppapi/c/pp_var.h"
+#include "ppapi/c/ppb_var.h"
+
+namespace ppapi_proxy {
+
+// Implements the plugin side of the PPB_Var interface.
+// This implementation also determines how PP_Vars are represented internally
+// in the proxied implementation.
+class PluginVar {
+ public:
+  // Returns an interface pointer suitable to the PPAPI client.
+  static const PPB_Var* GetInterface();
+
+  // String helpers.
+  static PP_Var StringToPPVar(PP_Module module_id, const std::string& str);
+  static std::string PPVarToString(const PP_Var& var);
+
+  // Printing and debugging.
+  static void Print(const PP_Var& var);
+  static std::string DebugString(const PP_Var& var);
+
+ private:
+  NACL_DISALLOW_COPY_AND_ASSIGN(PluginVar);
+};
+
+}  // namespace ppapi_proxy
+
+#endif  // NATIVE_CLIENT_SRC_SHARED_PPAPI_PROXY_PLUGIN_VAR_H_
+