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

chrome/browser/storage_monitor/media_storage_util.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 "chrome/browser/storage_monitor/media_storage_util.h"
 
 #include <vector>
 
 #include "base/callback.h"
 #include "base/file_util.h"
@@ skipping 169 matching lines @@
       return std::string(kMacImageCapture) + unique_id;
   }
   NOTREACHED();
   return std::string();
 }
 
 // static
 bool MediaStorageUtil::CrackDeviceId(const std::string& device_id,
                                      Type* type, std::string* unique_id) {
   size_t prefix_length = device_id.find_first_of(':');
-  std::string prefix = prefix_length != std::string::npos ?
-                       device_id.substr(0, prefix_length + 1) : "";
+  std::string prefix = prefix_length != std::string::npos
+                           ? device_id.substr(0, prefix_length + 1)
+                           : std::string();
 
   Type found_type;
   if (prefix == kRemovableMassStorageWithDCIMPrefix) {
     found_type = REMOVABLE_MASS_STORAGE_WITH_DCIM;
   } else if (prefix == kRemovableMassStorageNoDCIMPrefix) {
     found_type = REMOVABLE_MASS_STORAGE_NO_DCIM;
   } else if (prefix == kFixedMassStoragePrefix) {
     found_type = FIXED_MASS_STORAGE;
   } else if (prefix == kMtpPtpPrefix) {
     found_type = MTP_OR_PTP;
@@ skipping 185 matching lines @@
       static_cast<enum DeviceInfoHistogramBuckets>(event_number);
   if (event >= DEVICE_INFO_BUCKET_BOUNDARY) {
     NOTREACHED();
     return;
   }
   UMA_HISTOGRAM_ENUMERATION("MediaDeviceNotifications.DeviceInfo", event,
                             DEVICE_INFO_BUCKET_BOUNDARY);
 }
 
 }  // namespace chrome