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

webkit/fileapi/file_system_origin_database.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/fileapi/file_system_origin_database.h"
 
 #include <set>
 
 #include "base/file_util.h"
 #include "base/format_macros.h"
@@ skipping 247 matching lines @@
   HandleError(FROM_HERE, status);
   return false;
 }
 
 bool FileSystemOriginDatabase::ListAllOrigins(
     std::vector<OriginRecord>* origins) {
   if (!Init(REPAIR_ON_CORRUPTION))
     return false;
   DCHECK(origins);
   scoped_ptr<leveldb::Iterator> iter(db_->NewIterator(leveldb::ReadOptions()));
-  std::string origin_key_prefix = OriginToOriginKey("");
+  std::string origin_key_prefix = OriginToOriginKey(std::string());
   iter->Seek(origin_key_prefix);
   origins->clear();
   while (iter->Valid() &&
       StartsWithASCII(iter->key().ToString(), origin_key_prefix, true)) {
     std::string origin =
       iter->key().ToString().substr(origin_key_prefix.length());
     base::FilePath path = StringToFilePath(iter->value().ToString());
     origins->push_back(OriginRecord(origin, path));
     iter->Next();
   }
@@ skipping 30 matching lines @@
       db_->Put(leveldb::WriteOptions(), LastPathKey(), std::string("-1"));
   if (!status.ok()) {
     HandleError(FROM_HERE, status);
     return false;
   }
   *number = -1;
   return true;
 }
 
 }  // namespace fileapi