srpcgen: Use 'const char*' for string parameters

ppapi/native_client/src/shared/ppapi_proxy/ppp_rpc_client.cc

-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Copyright (c) 2012 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.
 //
 // WARNING WARNING WARNING WARNING WARNING WARNING WARNING WARNING WARNING
 //
 // Automatically generated code.  See srpcgen.py
 //
 // NaCl Simple Remote Procedure Call interface abstractions.
 
 #include "trusted/srpcgen/ppp_rpc.h"
@@ skipping 24 matching lines @@
       read_buffer_bytes, read_buffer
   );
   return retval;
 }
 
 NaClSrpcError PppRpcClient::PPP_InitializeModule(
     NaClSrpcChannel* channel,
     int32_t pid,
     PP_Module module,
     NaClSrpcImcDescType upcall_channel_desc,
-    char* service_description,
+    const char* service_description,
     int32_t* nacl_pid,
     int32_t* success)  {
   NaClSrpcError retval;
   retval = NaClSrpcInvokeBySignature(
       channel,
       "PPP_InitializeModule:iihs:ii",
       pid,
       module,
       upcall_channel_desc,
       service_description,
       nacl_pid,
       success
   );
   return retval;
 }
 
 NaClSrpcError PppRpcClient::PPP_ShutdownModule(
     NaClSrpcChannel* channel)  {
   NaClSrpcError retval;
   retval = NaClSrpcInvokeBySignature(
       channel,
       "PPP_ShutdownModule::"
   );
   return retval;
 }
 
 NaClSrpcError PppRpcClient::PPP_GetInterface(
     NaClSrpcChannel* channel,
-    char* interface_name,
+    const char* interface_name,
     int32_t* exports_interface_name)  {
   NaClSrpcError retval;
   retval = NaClSrpcInvokeBySignature(
       channel,
       "PPP_GetInterface:s:i",
       interface_name,
       exports_interface_name
   );
   return retval;
 }
@@ skipping 376 matching lines @@
       instance,
       factor,
       text_only
   );
   if (retval == NACL_SRPC_RESULT_INTERNAL)
     ppapi_proxy::CleanUpAfterDeadNexe(instance);
   return retval;
 }