Rewrite std::string("") to std::string(), Linux edition.

google_apis/gaia/google_service_auth_error.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 "google_apis/gaia/google_service_auth_error.h"
 
 #include <string>
 
 #include "base/json/json_reader.h"
 #include "base/logging.h"
@@ skipping 207 matching lines @@
     two_factor_value->SetString("promptText", second_factor_.prompt_text);
     two_factor_value->SetString("alternateText", second_factor_.alternate_text);
     two_factor_value->SetInteger("fieldLength", second_factor_.field_length);
   }
   return value;
 }
 
 std::string GoogleServiceAuthError::ToString() const {
   switch (state_) {
     case NONE:
-      return "";
+      return std::string();
     case INVALID_GAIA_CREDENTIALS:
       return "Invalid credentials.";
     case USER_NOT_SIGNED_UP:
       return "Not authorized.";
     case CONNECTION_FAILED:
       return base::StringPrintf("Connection failed (%d).", network_error_);
     case CAPTCHA_REQUIRED:
       return base::StringPrintf("CAPTCHA required (%s).",
                                 captcha_.token.c_str());
     case ACCOUNT_DELETED:
@@ skipping 37 matching lines @@
 GoogleServiceAuthError::GoogleServiceAuthError(
     State s,
     const std::string& captcha_token,
     const std::string& prompt_text,
     const std::string& alternate_text,
     int field_length)
     : state_(s),
       second_factor_(captcha_token, prompt_text, alternate_text, field_length),
       network_error_(0) {
 }