Remove redundant mapping of net errors to strings.

net/tools/gdig/gdig.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 <stdio.h>
 #include <string>
 
 #include "base/at_exit.h"
 #include "base/bind.h"
 #include "base/cancelable_callback.h"
@@ skipping 469 matching lines @@
   DCHECK_LT(entry_index, replay_log_.size());
   --active_resolves_;
   base::TimeDelta resolve_end_time = base::Time::Now() - start_time_;
   base::TimeDelta resolve_time = resolve_end_time - resolve_start_time;
   printf("%u %d %d %s %d ",
          entry_index,
          static_cast<int>(resolve_end_time.InMilliseconds()),
          static_cast<int>(resolve_time.InMilliseconds()),
          replay_log_[entry_index].domain_name.c_str(), val);
   if (val != OK) {
-    printf("%s", ErrorToString(val));
+    std::string error_string = ErrorToString(val);
+    printf("%s", error_string.c_str());
   } else {
     for (size_t i = 0; i < address_list->size(); ++i) {
       if (i != 0)
         printf(" ");
       printf("%s", (*address_list)[i].ToStringWithoutPort().c_str());
     }
   }
   printf("\n");
   if (active_resolves_ == 0 && replay_log_index_ >= replay_log_.size())
     Finish(RESULT_OK);
 }
 
 void GDig::OnTimeout() {
   fprintf(stderr, "Timed out waiting to load the dns config\n");
   Finish(RESULT_NO_CONFIG);
 }
 
 }  // empty namespace
 
 }  // namespace net
 
 int main(int argc, const char* argv[]) {
   net::GDig dig;
   return dig.Main(argc, argv);
 }