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

content/renderer/pepper/pepper_device_enumeration_event_handler.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/renderer/pepper/pepper_device_enumeration_event_handler.h"
 
 #include "base/logging.h"
 #include "ppapi/shared_impl/ppb_device_ref_shared.h"
 
 namespace content {
@@ skipping 60 matching lines @@
 }
 
 void PepperDeviceEnumerationEventHandler::OnDeviceOpened(
     int request_id,
     const std::string& label,
     const StreamDeviceInfo& device_info) {
   NotifyDeviceOpened(request_id, true, label);
 }
 
 void PepperDeviceEnumerationEventHandler::OnDeviceOpenFailed(int request_id) {
-  NotifyDeviceOpened(request_id, false, "");
+  NotifyDeviceOpened(request_id, false, std::string());
 }
 
 // static
 MediaStreamType PepperDeviceEnumerationEventHandler::FromPepperDeviceType(
     PP_DeviceType_Dev type) {
   switch (type) {
     case PP_DEVICETYPE_DEV_INVALID:
       return MEDIA_NO_SERVICE;
     case PP_DEVICETYPE_DEV_AUDIOCAPTURE:
       return MEDIA_DEVICE_AUDIO_CAPTURE;
@@ skipping 56 matching lines @@
     return;
   }
 
   PepperPluginDelegateImpl::OpenDeviceCallback callback = iter->second;
   open_callbacks_.erase(iter);
 
   callback.Run(request_id, succeeded, label);
 }
 
 }  // namespace content