Correct const accessors in base/values.(h|cc), Part II (ListValue)

ppapi/shared_impl/private/ppb_x509_certificate_private_shared.cc

 // 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.
 
 #include "ppapi/shared_impl/private/ppb_x509_certificate_private_shared.h"
 
 #include "base/logging.h"
 #include "ppapi/shared_impl/ppapi_globals.h"
 #include "ppapi/shared_impl/var.h"
 #include "ppapi/shared_impl/var_tracker.h"
@@ skipping 12 matching lines @@
     PP_X509Certificate_Private_Field field,
     base::Value* value) {
   uint32_t index = static_cast<uint32_t>(field);
   bool success = values_.Set(index, value);
   DCHECK(success);
 }
 
 PP_Var PPB_X509Certificate_Fields::GetFieldAsPPVar(
     PP_X509Certificate_Private_Field field) const {
   uint32_t index = static_cast<uint32_t>(field);
-  base::Value* value;
+  const base::Value* value;
   bool success = values_.Get(index, &value);
   if (!success) {
     // Our list received might be smaller than the number of fields, so just
     // return null if the index is OOB.
     return PP_MakeNull();
   }
 
   switch (value->GetType()) {
     case Value::TYPE_NULL:
       return PP_MakeNull();
@@ skipping 93 matching lines @@
     const std::vector<char>& der,
     PPB_X509Certificate_Fields* result) {
   // A concrete PPB_X509Certificate_Private_Shared should only ever be
   // constructed by passing in PPB_X509Certificate_Fields, in which case it is
   // already initialized.
   CHECK(false);
   return false;
 }
 
 }  // namespace ppapi