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

content/shell/renderer/test_runner/TestCommon.cpp

-// 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/TestCommon.h"
-
-namespace content {
-
-namespace {
-
-const char layoutTestsPattern[] = "/LayoutTests/";
-const std::string::size_type layoutTestsPatternSize = sizeof(layoutTestsPattern) - 1;
-const char fileUrlPattern[] = "file:/";
-const char fileTestPrefix[] = "(file test):";
-const char dataUrlPattern[] = "data:";
-const std::string::size_type dataUrlPatternSize = sizeof(dataUrlPattern) - 1;
-
-}  // namespace
-
-std::string normalizeLayoutTestURL(const std::string& url)
-{
-    std::string result = url;
-    size_t pos;
-    if (!url.find(fileUrlPattern) && ((pos = url.find(layoutTestsPattern)) != std::string::npos)) {
-        // adjust file URLs to match upstream results.
-        result.replace(0, pos + layoutTestsPatternSize, fileTestPrefix);
-    } else if (!url.find(dataUrlPattern)) {
-        // URL-escape data URLs to match results upstream.
-        std::string path = url.substr(dataUrlPatternSize);
-        result.replace(dataUrlPatternSize, url.length(), path);
-    }
-    return result;
-}
-
-}  // namespace content