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

content/browser/speech/speech_recognition_manager_impl.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 "content/browser/speech/speech_recognition_manager_impl.h"
 
 #include "base/bind.h"
 #include "content/browser/browser_main_loop.h"
 #include "content/browser/renderer_host/media/media_stream_manager.h"
 #include "content/browser/speech/google_one_shot_remote_engine.h"
@@ skipping 82 matching lines @@
   remote_engine_config.language = config.language;
   remote_engine_config.grammars = config.grammars;
   remote_engine_config.audio_sample_rate = SpeechRecognizer::kAudioSampleRate;
   remote_engine_config.audio_num_bits_per_sample =
      SpeechRecognizer::kNumBitsPerAudioSample;
   remote_engine_config.filter_profanities = config.filter_profanities;
   remote_engine_config.continuous = config.continuous;
   remote_engine_config.interim_results = config.interim_results;
   remote_engine_config.max_hypotheses = config.max_hypotheses;
   remote_engine_config.hardware_info = hardware_info;
-  remote_engine_config.origin_url = can_report_metrics ? config.origin_url : "";
+  remote_engine_config.origin_url =
+      can_report_metrics ? config.origin_url : std::string();
 
   SpeechRecognitionEngine* google_remote_engine;
   if (config.is_legacy_api) {
     google_remote_engine =
         new GoogleOneShotRemoteEngine(config.url_request_context_getter);
   } else {
     google_remote_engine =
         new GoogleStreamingRemoteEngine(config.url_request_context_getter);
   }
 
@@ skipping 527 matching lines @@
 
 SpeechRecognitionManagerImpl::Session::Session()
   : id(kSessionIDInvalid),
     listener_is_active(true) {
 }
 
 SpeechRecognitionManagerImpl::Session::~Session() {
 }
 
 }  // namespace content