Add more string_util functions to base namespace.

components/url_fixer/url_fixer_unittest.cc

 // Copyright (c) 2011 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 <stdlib.h>
 
 #include "base/base_paths.h"
 #include "base/basictypes.h"
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
@@ skipping 489 matching lines @@
 
   // test file in the subdir
   base::FilePath relative_file = sub_dir.Append(sub_file);
   EXPECT_TRUE(IsMatchingFileURL(
       url_fixer::FixupRelativeFile(temp_dir_.path(),
           relative_file).possibly_invalid_spec(), full_path));
 
   // test file in the subdir with different slashes and escaping.
   base::FilePath::StringType relative_file_str = sub_dir.value() +
       FILE_PATH_LITERAL("/") + sub_file.value();
-  ReplaceSubstringsAfterOffset(&relative_file_str, 0,
+  base::ReplaceSubstringsAfterOffset(&relative_file_str, 0,
       FILE_PATH_LITERAL(" "), FILE_PATH_LITERAL("%20"));
   EXPECT_TRUE(IsMatchingFileURL(
       url_fixer::FixupRelativeFile(temp_dir_.path(),
           base::FilePath(relative_file_str)).possibly_invalid_spec(),
               full_path));
 
   // test relative directories and duplicate slashes
   // (should resolve to the same file as above)
   relative_file_str = sub_dir.value() + FILE_PATH_LITERAL("/../") +
       sub_dir.value() + FILE_PATH_LITERAL("///./") + sub_file.value();
   EXPECT_TRUE(IsMatchingFileURL(
       url_fixer::FixupRelativeFile(temp_dir_.path(),
           base::FilePath(relative_file_str)).possibly_invalid_spec(),
               full_path));
 
   // done with the subdir
   EXPECT_TRUE(base::DeleteFile(full_path, false));
   EXPECT_TRUE(base::DeleteFile(new_dir, true));
 
   // Test that an obvious HTTP URL isn't accidentally treated as an absolute
   // file path (on account of system-specific craziness).
   base::FilePath empty_path;
   base::FilePath http_url_path(FILE_PATH_LITERAL("http://../"));
   EXPECT_TRUE(
       url_fixer::FixupRelativeFile(empty_path, http_url_path).SchemeIs("http"));
 }