srpcgen: Use 'const char*' for string parameters

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

Index: ppapi/native_client/src/shared/ppapi_proxy/ppp_rpc_client.cc
diff --git a/ppapi/native_client/src/shared/ppapi_proxy/ppp_rpc_client.cc b/ppapi/native_client/src/shared/ppapi_proxy/ppp_rpc_client.cc
index 27dc2e17a35c0daddd9ff4d04711cd347cc5bc8a..636aee16f358f564608ec6e2340e6f52578feaef 100644
--- a/ppapi/native_client/src/shared/ppapi_proxy/ppp_rpc_client.cc
+++ b/ppapi/native_client/src/shared/ppapi_proxy/ppp_rpc_client.cc
@@ -1,4 +1,4 @@
-// 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.
 //
@@ -43,7 +43,7 @@ NaClSrpcError PppRpcClient::PPP_InitializeModule(
     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;
@@ -72,7 +72,7 @@ NaClSrpcError PppRpcClient::PPP_ShutdownModule(
 
 NaClSrpcError PppRpcClient::PPP_GetInterface(
     NaClSrpcChannel* channel,
-    char* interface_name,
+    const char* interface_name,
     int32_t* exports_interface_name)  {
   NaClSrpcError retval;
   retval = NaClSrpcInvokeBySignature(