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

webkit/media/crypto/proxy_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 "webkit/media/crypto/proxy_decryptor.h"
 
 #include "base/bind.h"
 #include "base/callback_helpers.h"
 #include "base/logging.h"
 #include "media/crypto/aes_decryptor.h"
@@ skipping 99 matching lines @@
                                         int init_data_length) {
   // We do not support run-time switching of decryptors. GenerateKeyRequest()
   // only creates a new decryptor when |decryptor_| is not initialized.
   DVLOG(1) << "GenerateKeyRequest: key_system = " << key_system;
 
   base::AutoLock auto_lock(lock_);
 
   if (!decryptor_) {
     decryptor_ = CreateDecryptor(key_system);
     if (!decryptor_) {
-      key_error_cb_.Run(key_system, "", media::Decryptor::kClientError, 0);
+      key_error_cb_.Run(
+          key_system, std::string(), media::Decryptor::kClientError, 0);
       return false;
     }
   }
 
   if (!decryptor_->GenerateKeyRequest(key_system, type,
                                       init_data, init_data_length)) {
     decryptor_.reset();
     return false;
   }
 
@@ skipping 84 matching lines @@
 void ProxyDecryptor::NeedKey(const std::string& key_system,
                              const std::string& session_id,
                              const std::string& type,
                              scoped_ptr<uint8[]> init_data,
                              int init_data_size) {
   need_key_cb_.Run(key_system, session_id, type,
                    init_data.Pass(), init_data_size);
 }
 
 }  // namespace webkit_media