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

chrome/service/cloud_print/connector_settings.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 "chrome/service/cloud_print/connector_settings.h"
 
 #include "base/values.h"
 #include "chrome/common/cloud_print/cloud_print_constants.h"
 #include "chrome/common/pref_names.h"
 #include "chrome/service/cloud_print/print_system.h"
@@ skipping 14 matching lines @@
       xmpp_ping_enabled_(false),
       xmpp_ping_timeout_sec_(kDefaultXmppPingTimeoutSecs) {
 }
 
 ConnectorSettings::~ConnectorSettings() {
 }
 
 void ConnectorSettings::InitFrom(ServiceProcessPrefs* prefs) {
   CopyFrom(ConnectorSettings());
 
-  proxy_id_ = prefs->GetString(prefs::kCloudPrintProxyId, "");
+  proxy_id_ = prefs->GetString(prefs::kCloudPrintProxyId, std::string());
   if (proxy_id_.empty()) {
     proxy_id_ = PrintSystem::GenerateProxyId();
     prefs->SetString(prefs::kCloudPrintProxyId, proxy_id_);
     prefs->WritePrefs();
   }
 
   // Getting print system specific settings from the preferences.
   const base::DictionaryValue* print_system_settings =
       prefs->GetDictionary(prefs::kCloudPrintPrintSystemSettings);
   if (print_system_settings) {
     print_system_settings_.reset(print_system_settings->DeepCopy());
     // TODO(vitalybuka) : Consider to rename and move out option from
     // print_system_settings.
     print_system_settings_->GetBoolean(kDeleteOnEnumFail,
                                        &delete_on_enum_fail_);
   }
 
   // Check if there is an override for the cloud print server URL.
-  server_url_ = GURL(prefs->GetString(prefs::kCloudPrintServiceURL, ""));
+  server_url_ =
+      GURL(prefs->GetString(prefs::kCloudPrintServiceURL, std::string()));
   DCHECK(server_url_.is_empty() || server_url_.is_valid());
   if (server_url_.is_empty() || !server_url_.is_valid()) {
     server_url_ = GURL(kDefaultCloudPrintServerUrl);
   }
   DCHECK(server_url_.is_valid());
 
   connect_new_printers_ = prefs->GetBoolean(
       prefs::kCloudPrintConnectNewPrinters, true);
 
   xmpp_ping_enabled_ = prefs->GetBoolean(
@@ skipping 32 matching lines @@
 void ConnectorSettings::SetXmppPingTimeoutSec(int timeout) {
   xmpp_ping_timeout_sec_ = timeout;
   if (xmpp_ping_timeout_sec_ < kMinimumXmppPingTimeoutSecs) {
     LOG(WARNING) <<
         "CP_CONNECTOR: XMPP ping timeout is less then minimal value";
     xmpp_ping_timeout_sec_ = kMinimumXmppPingTimeoutSecs;
   }
 }
 
 }  // namespace cloud_print