Add version-specific defines for each C interface.

ppapi/c/dev/ppb_var_deprecated.h

 /* Copyright (c) 2010 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_C_PPB_VAR_DEPRECATED_H_
 #define PPAPI_C_PPB_VAR_DEPRECATED_H_
 
 #include "ppapi/c/dev/deprecated_bool.h"
 #include "ppapi/c/pp_instance.h"
 #include "ppapi/c/pp_module.h"
 #include "ppapi/c/pp_stdint.h"
 #include "ppapi/c/pp_var.h"
 
 struct PPP_Class_Deprecated;
 
-#define PPB_VAR_DEPRECATED_INTERFACE "PPB_Var(Deprecated);0.3"
+#define PPB_VAR_DEPRECATED_INTERFACE_0_3 "PPB_Var(Deprecated);0.3"
+#define PPB_VAR_DEPRECATED_INTERFACE PPB_VAR_DEPRECATED_INTERFACE_0_3
 
 /**
  * @file
  * Defines the PPB_Var_Deprecated struct.
  * See http://code.google.com/p/ppapi/wiki/InterfacingWithJavaScript
  * for general information on using this interface.
  * {PENDING: Should the generated doc really be pointing to methods?}
  *
  * @addtogroup PPB
  * @{
@@ skipping 216 matching lines @@
       const struct PPP_Class_Deprecated* object_class,
       void* object_data);
 };
 
 /**
  * @}
  * End addtogroup PPB
  */
 #endif  /* PPAPI_C_PPB_VAR_DEPRECATED_H_ */