Check for the specific interface versions required in pp::Var.

ppapi/cpp/var.cc

 // 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.
 
 #include "ppapi/cpp/var.h"
 
 #include <stdio.h>
 #include <string.h>
 
 #include <algorithm>
 
 #include "ppapi/c/pp_var.h"
 #include "ppapi/c/ppb_var.h"
 #include "ppapi/cpp/instance.h"
 #include "ppapi/cpp/logging.h"
 #include "ppapi/cpp/module.h"
 #include "ppapi/cpp/module_impl.h"
 
 // Define equivalent to snprintf on Windows.
 #if defined(_MSC_VER)
 #  define snprintf sprintf_s
 #endif
 
 namespace pp {
 
 namespace {
 
-template <> const char* interface_name<PPB_Var>() {
-  return PPB_VAR_INTERFACE;
+template <> const char* interface_name<PPB_Var_1_1>() {
+  return PPB_VAR_INTERFACE_1_1;
 }
 template <> const char* interface_name<PPB_Var_1_0>() {
   return PPB_VAR_INTERFACE_1_0;
 }
 
 // Technically you can call AddRef and Release on any Var, but it may involve
 // cross-process calls depending on the plugin. This is an optimization so we
 // only do refcounting on the necessary objects.
 inline bool NeedsRefcounting(const PP_Var& var) {
   return var.type > PP_VARTYPE_DOUBLE;
 }
 
 // This helper function detects whether PPB_Var version 1.1 is available. If so,
 // it uses it to create a PP_Var for the given string. Otherwise it falls back
 // to PPB_Var version 1.0.
 PP_Var VarFromUtf8Helper(const char* utf8_str, uint32_t len) {
-  if (has_interface<PPB_Var>()) {
-    return get_interface<PPB_Var>()->VarFromUtf8(utf8_str, len);
+  if (has_interface<PPB_Var_1_1>()) {
+    return get_interface<PPB_Var_1_1>()->VarFromUtf8(utf8_str, len);
   } else if (has_interface<PPB_Var_1_0>()) {
     return get_interface<PPB_Var_1_0>()->VarFromUtf8(Module::Get()->pp_module(),
                                                      utf8_str,
                                                      len);
   } else {
     return PP_MakeNull();
   }
 }
 
 }  // namespace
@@ skipping 181 matching lines @@
     // TODO(dmichael): We could make this dump hex. Maybe DebugString should be
     // virtual?
     snprintf(buf, sizeof(buf), "Var(ARRAY_BUFFER)");
   } else if (is_object()) {
     snprintf(buf, sizeof(buf), "Var(OBJECT)");
   }
   return buf;
 }
 
 }  // namespace pp