Move test runner to a component

content/shell/renderer/test_runner/test_common.cc

-// Copyright 2014 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 "content/shell/renderer/test_runner/test_common.h"
-
-namespace content {
-
-namespace {
-
-const char layout_tests_pattern[] = "/LayoutTests/";
-const std::string::size_type layout_tests_pattern_size =
-    sizeof(layout_tests_pattern) - 1;
-const char file_url_pattern[] = "file:/";
-const char file_test_prefix[] = "(file test):";
-const char data_url_pattern[] = "data:";
-const std::string::size_type data_url_pattern_size =
-    sizeof(data_url_pattern) - 1;
-
-}  // namespace
-
-std::string NormalizeLayoutTestURL(const std::string& url) {
-  std::string result = url;
-  size_t pos;
-  if (!url.find(file_url_pattern) &&
-      ((pos = url.find(layout_tests_pattern)) != std::string::npos)) {
-    // adjust file URLs to match upstream results.
-    result.replace(0, pos + layout_tests_pattern_size, file_test_prefix);
-  } else if (!url.find(data_url_pattern)) {
-    // URL-escape data URLs to match results upstream.
-    std::string path = url.substr(data_url_pattern_size);
-    result.replace(data_url_pattern_size, url.length(), path);
-  }
-  return result;
-}
-
-}  // namespace content