Add version-specific defines for each C interface.

ppapi/c/dev/ppb_transport_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_PPB_TRANSPORT_DEV_H_
 #define PPAPI_C_PPB_TRANSPORT_DEV_H_
 
 #include "ppapi/c/pp_bool.h"
 #include "ppapi/c/pp_completion_callback.h"
 #include "ppapi/c/pp_module.h"
 #include "ppapi/c/pp_instance.h"
 #include "ppapi/c/pp_resource.h"
 #include "ppapi/c/pp_stdint.h"
 #include "ppapi/c/pp_var.h"
 
-#define PPB_TRANSPORT_DEV_INTERFACE "PPB_Transport;0.4"
+#define PPB_TRANSPORT_DEV_INTERFACE_0_4 "PPB_Transport;0.4"
+#define PPB_TRANSPORT_DEV_INTERFACE PPB_TRANSPORT_DEV_INTERFACE_0_4
 
 struct PPB_Transport_Dev {
   // Creates a new transport object with the specified name using the
   // specified protocol.
   PP_Resource (*CreateTransport)(PP_Instance instance,
                                  const char* name,
                                  const char* proto);
 
   // Returns PP_TRUE if resource is a Transport, PP_FALSE otherwise.
   PP_Bool (*IsTransport)(PP_Resource resource);
@@ skipping 37 matching lines @@
   int32_t (*Send)(PP_Resource transport,
                   const void* data,
                   uint32_t len,
                   struct PP_CompletionCallback cb);
 
   // Disconnects from the remote peer.
   int32_t (*Close)(PP_Resource transport);
 };
 
 #endif  /* PPAPI_C_PPB_TRANSPORT_DEV_H_ */