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

chrome/browser/media_galleries/media_galleries_preferences.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/media_galleries/media_galleries_preferences.h"
 
 #include "base/path_service.h"
 #include "base/prefs/pref_service.h"
 #include "base/stl_util.h"
 #include "base/strings/string_number_conversions.h"
@@ skipping 240 matching lines @@
 
       MediaGalleryPrefInfo gallery_info;
       if (!PopulateGalleryPrefInfoFromDictionary(*dict, &gallery_info))
         continue;
 
       known_galleries_[gallery_info.pref_id] = gallery_info;
       device_map_[gallery_info.device_id].insert(gallery_info.pref_id);
     }
   }
   if (notify_observers)
-    NotifyChangeObservers("");
+    NotifyChangeObservers(std::string());
 }
 
 void MediaGalleriesPreferences::NotifyChangeObservers(
     const std::string& extension_id) {
   FOR_EACH_OBSERVER(GalleryChangeObserver,
                     gallery_change_observers_,
                     OnGalleryChanged(this, extension_id));
 }
 
 void MediaGalleriesPreferences::AddGalleryChangeObserver(
@@ skipping 364 matching lines @@
 }
 
 extensions::ExtensionPrefs*
 MediaGalleriesPreferences::GetExtensionPrefs() const {
   ExtensionService* extension_service =
       extensions::ExtensionSystem::Get(profile_)->extension_service();
   return extension_service->extension_prefs();
 }
 
 }  // namespace chrome