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

chrome/browser/sync/glue/synced_session.h

 // 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.
 
 #ifndef CHROME_BROWSER_SYNC_GLUE_SYNCED_SESSION_H_
 #define CHROME_BROWSER_SYNC_GLUE_SYNCED_SESSION_H_
 
 #include <map>
 #include <string>
 
@@ skipping 56 matching lines @@
         return "linux";
       case SyncedSession::TYPE_CHROMEOS:
         return "chromeos";
       case SyncedSession::TYPE_OTHER:
         return "other";
       case SyncedSession::TYPE_PHONE:
         return "phone";
       case SyncedSession::TYPE_TABLET:
         return "tablet";
       default:
-        return "";
+        return std::string();
     }
   }
 
  private:
   DISALLOW_COPY_AND_ASSIGN(SyncedSession);
 };
 
 // Control which foreign tabs we're interested in syncing/displaying. Checks
 // that the tab has navigations and contains at least one valid url.
 // Note: chrome:// and file:// are not considered valid urls (for syncing).
 bool ShouldSyncSessionTab(const SessionTab& tab);
 
 // Checks whether the window has tabs to sync. If no tabs to sync, it returns
 // true, false otherwise.
 bool SessionWindowHasNoTabsToSync(const SessionWindow& window);
 
 }  // namespace browser_sync
 
 #endif  // CHROME_BROWSER_SYNC_GLUE_SYNCED_SESSION_H_