Remove redundant mapping of net errors to strings.

net/quic/crypto/proof_verifier_chromium.cc

 // Copyright 2013 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 "net/quic/crypto/proof_verifier_chromium.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/callback_helpers.h"
 #include "base/compiler_specific.h"
@@ skipping 211 matching lines @@
       &verify_details_->cert_verify_result,
       base::Bind(&ProofVerifierChromium::Job::OnIOComplete,
                  base::Unretained(this)),
       net_log_);
 }
 
 int ProofVerifierChromium::Job::DoVerifyCertComplete(int result) {
   verifier_.reset();
 
   if (result != OK) {
+    std::string error_string = ErrorToString(result);
     error_details_ = StringPrintf("Failed to verify certificate chain: %s",
-                                  ErrorToString(result));
+                                  error_string.c_str());
     DLOG(WARNING) << error_details_;
   }
 
   // Exit DoLoop and return the result to the caller to VerifyProof.
   DCHECK_EQ(STATE_NONE, next_state_);
   return result;
 }
 
 bool ProofVerifierChromium::Job::VerifySignature(const string& signed_data,
-                                            const string& signature,
-                                            const string& cert) {
+                                                 const string& signature,
+                                                 const string& cert) {
   StringPiece spki;
   if (!asn1::ExtractSPKIFromDERCert(cert, &spki)) {
     DLOG(WARNING) << "ExtractSPKIFromDERCert failed";
     return false;
   }
 
   crypto::SignatureVerifier verifier;
 
   size_t size_bits;
   X509Certificate::PublicKeyType type;
@@ skipping 91 matching lines @@
   }
   return status;
 }
 
 void ProofVerifierChromium::OnJobComplete(Job* job) {
   active_jobs_.erase(job);
   delete job;
 }
 
 }  // namespace net