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

media/crypto/aes_decryptor.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 "media/crypto/aes_decryptor.h"
 
 #include <vector>
 
 #include "base/logging.h"
 #include "base/stl_util.h"
@@ skipping 134 matching lines @@
   std::string session_id_string(base::UintToString(next_session_id_++));
 
   // For now, the AesDecryptor does not care about |key_system| and |type|;
   // just fire the event with the |init_data| as the request.
   std::string message;
   if (init_data && init_data_length) {
     message = std::string(reinterpret_cast<const char*>(init_data),
                           init_data_length);
   }
 
-  key_message_cb_.Run(key_system, session_id_string, message, "");
+  key_message_cb_.Run(key_system, session_id_string, message, std::string());
   return true;
 }
 
 void AesDecryptor::AddKey(const std::string& key_system,
                           const uint8* key,
                           int key_length,
                           const uint8* init_data,
                           int init_data_length,
                           const std::string& session_id) {
   CHECK(key);
@@ skipping 162 matching lines @@
 bool AesDecryptor::DecryptionKey::Init() {
   CHECK(!secret_.empty());
   decryption_key_.reset(crypto::SymmetricKey::Import(
       crypto::SymmetricKey::AES, secret_));
   if (!decryption_key_.get())
     return false;
   return true;
 }
 
 }  // namespace media