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

webkit/plugins/ppapi/content_decryptor_delegate.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/plugins/ppapi/content_decryptor_delegate.h"
 
 #include "base/callback_helpers.h"
 #include "base/debug/trace_event.h"
 #include "base/message_loop_proxy.h"
 #include "media/base/audio_decoder_config.h"
@@ skipping 609 matching lines @@
 }
 
 void ContentDecryptorDelegate::KeyAdded(PP_Var key_system_var,
                                         PP_Var session_id_var) {
   if (key_added_cb_.is_null())
     return;
 
   StringVar* key_system_string = StringVar::FromPPVar(key_system_var);
   StringVar* session_id_string = StringVar::FromPPVar(session_id_var);
   if (!key_system_string || !session_id_string) {
-    key_error_cb_.Run("", "", media::Decryptor::kUnknownError, 0);
+    key_error_cb_.Run(
+        std::string(), std::string(), media::Decryptor::kUnknownError, 0);
     return;
   }
 
   key_added_cb_.Run(key_system_string->value(), session_id_string->value());
 }
 
 void ContentDecryptorDelegate::KeyMessage(PP_Var key_system_var,
                                           PP_Var session_id_var,
                                           PP_Var message_var,
                                           PP_Var default_url_var) {
   if (key_message_cb_.is_null())
     return;
 
   StringVar* key_system_string = StringVar::FromPPVar(key_system_var);
   StringVar* session_id_string = StringVar::FromPPVar(session_id_var);
 
   ArrayBufferVar* message_array_buffer =
       ArrayBufferVar::FromPPVar(message_var);
 
   std::string message;
   if (message_array_buffer) {
     const char* data = static_cast<const char*>(message_array_buffer->Map());
     message.assign(data, message_array_buffer->ByteLength());
   }
 
   StringVar* default_url_string = StringVar::FromPPVar(default_url_var);
 
   if (!key_system_string || !session_id_string || !default_url_string) {
-    key_error_cb_.Run("", "", media::Decryptor::kUnknownError, 0);
+    key_error_cb_.Run(
+        std::string(), std::string(), media::Decryptor::kUnknownError, 0);
     return;
   }
 
   key_message_cb_.Run(key_system_string->value(),
                       session_id_string->value(),
                       message,
                       default_url_string->value());
 }
 
 void ContentDecryptorDelegate::KeyError(PP_Var key_system_var,
                                         PP_Var session_id_var,
                                         int32_t media_error,
                                         int32_t system_code) {
   if (key_error_cb_.is_null())
     return;
 
   StringVar* key_system_string = StringVar::FromPPVar(key_system_var);
   StringVar* session_id_string = StringVar::FromPPVar(session_id_var);
   if (!key_system_string || !session_id_string) {
-    key_error_cb_.Run("", "", media::Decryptor::kUnknownError, 0);
+    key_error_cb_.Run(
+        std::string(), std::string(), media::Decryptor::kUnknownError, 0);
     return;
   }
 
   key_error_cb_.Run(
       key_system_string->value(),
       session_id_string->value(),
       static_cast<media::Decryptor::KeyError>(media_error),
       system_code);
 }
 
@@ skipping 332 matching lines @@
 
   if (free_buffers_.empty())
     return;
 
   tracking_info->buffer_id = free_buffers_.front();
   free_buffers_.pop();
 }
 
 }  // namespace ppapi
 }  // namespace webkit