Add version-specific defines for each C interface.

ppapi/c/dev/ppb_url_util_dev.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_C_DEV_PPB_URL_UTIL_DEV_H_
 #define PPAPI_C_DEV_PPB_URL_UTIL_DEV_H_
 
 #include "ppapi/c/pp_bool.h"
 #include "ppapi/c/pp_instance.h"
 #include "ppapi/c/pp_macros.h"
 #include "ppapi/c/pp_stdint.h"
 #include "ppapi/c/pp_var.h"
 
-#define PPB_URLUTIL_DEV_INTERFACE "PPB_URLUtil(Dev);0.6"
+#define PPB_URLUTIL_DEV_INTERFACE_0_6 "PPB_URLUtil(Dev);0.6"
+#define PPB_URLUTIL_DEV_INTERFACE PPB_URLUTIL_DEV_INTERFACE_0_6
 
 // A component specifies the range of the part of the URL. The begin specifies
 // the index into the string of the first character of that component. The len
 // specifies the length of that component.
 //
 // This range does not include any special delimiter for that component, so
 // the scheme doesn't include the trailing colon, the username and password
 // don't include the @ and :, the port doesn't include the colon, the query
 // doesn't include the ?, and the ref doesn't include the #.
 //
@@ skipping 100 matching lines @@
   // <object> element.
   // The components pointer, if non-NULL and the canonicalized URL is valid,
   // will identify the components of the resulting URL. Components may be NULL
   // to specify that no component information is necessary.
   struct PP_Var (*GetPluginInstanceURL)(
       PP_Instance instance, struct PP_URLComponents_Dev* components);
 };
 
 #endif  /* PPAPI_C_DEV_PPB_URL_UTIL_DEV_H_ */