Migrate TestCommon to Chromium c++ style and remove un-used header.

content/shell/renderer/test_runner/test_common.cc

+// Copyright 2013 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