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

webkit/fileapi/file_system_util_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_util.h"
 
 #include "base/files/file_path.h"
 #include "googleurl/src/gurl.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "webkit/fileapi/file_system_url.h"
@@ skipping 97 matching lines @@
     base::FilePath input = base::FilePath(test_cases[i].path);
     base::FilePath::StringType normalized_path_string =
         VirtualPath::GetNormalizedFilePath(input);
     EXPECT_EQ(test_cases[i].normalized_path, normalized_path_string);
   }
 }
 
 TEST_F(FileSystemUtilTest, IsAbsolutePath) {
   EXPECT_TRUE(VirtualPath::IsAbsolute(FILE_PATH_LITERAL("/")));
   EXPECT_TRUE(VirtualPath::IsAbsolute(FILE_PATH_LITERAL("/foo/bar")));
-  EXPECT_FALSE(VirtualPath::IsAbsolute(FILE_PATH_LITERAL("")));
+  EXPECT_FALSE(VirtualPath::IsAbsolute(base::FilePath::StringType()));
   EXPECT_FALSE(VirtualPath::IsAbsolute(FILE_PATH_LITERAL("foo/bar")));
 }
 
 TEST_F(FileSystemUtilTest, VirtualPathGetComponents) {
   struct test_data {
     const base::FilePath::StringType path;
     size_t count;
     const base::FilePath::StringType components[3];
   } test_cases[] = {
     { FILE_PATH_LITERAL("foo/bar"),
@@ skipping 86 matching lines @@
 
   EXPECT_TRUE(AreSameFileSystem(url_foo_temp_a, url_foo_temp_a));
   EXPECT_TRUE(AreSameFileSystem(url_foo_temp_a, url_foo_temp_b));
   EXPECT_FALSE(AreSameFileSystem(url_foo_temp_a, url_foo_perm_a));
   EXPECT_FALSE(AreSameFileSystem(url_foo_temp_a, url_bar_temp_a));
   EXPECT_FALSE(AreSameFileSystem(url_foo_temp_a, url_bar_perm_a));
 }
 
 }  // namespace (anonymous)
 }  // namespace fileapi