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

webkit/fileapi/file_system_directory_database_unittest.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_directory_database.h"
 
 #include <math.h>
 #include <limits>
 
 #include "base/file_util.h"
@@ skipping 551 matching lines @@
       &created, &error);
   ASSERT_EQ(base::PLATFORM_FILE_OK, error);
   ASSERT_TRUE(created);
   ASSERT_TRUE(base::ClosePlatformFile(file));
 
   EXPECT_TRUE(db()->IsFileSystemConsistent());
 }
 
 TEST_F(FileSystemDirectoryDatabaseTest, TestConsistencyCheck_RootLoop) {
   EXPECT_TRUE(db()->IsFileSystemConsistent());
-  MakeHierarchyLink(0, 0, FPL(""));
+  MakeHierarchyLink(0, 0, base::FilePath::StringType());
   EXPECT_FALSE(db()->IsFileSystemConsistent());
 }
 
 TEST_F(FileSystemDirectoryDatabaseTest, TestConsistencyCheck_DirectoryLoop) {
   FileId dir1_id;
   FileId dir2_id;
   base::FilePath::StringType dir1_name = FPL("foo");
   CreateDirectory(0, dir1_name, &dir1_id);
   CreateDirectory(dir1_id, FPL("bar"), &dir2_id);
 
@@ skipping 61 matching lines @@
                   -1, 1);
   InitDatabase();
   EXPECT_FALSE(db()->IsFileSystemConsistent());
 
   FileId file_id;
   EXPECT_FALSE(db()->GetChildWithName(0, kFileName, &file_id));
   EXPECT_TRUE(db()->IsFileSystemConsistent());
 }
 
 }  // namespace fileapi