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

content/shell/renderer/test_runner/test_common.h

+// 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.
+
+#ifndef CONTENT_SHELL_RENDERER_TEST_RUNNER_TEST_COMMON_H_
+#define CONTENT_SHELL_RENDERER_TEST_RUNNER_TEST_COMMON_H_
+
+#include <stdio.h>
+#include <string>
+
+#include "base/compiler_specific.h"
+
+#if defined(WIN32)
+#define snprintf(str, size, ...) _snprintf_s(str, size, size, __VA_ARGS__)

[jochen (gone - plz use gerrit), 2014/08/04 08:40:16]

can you please replace the remaining callsites on snprintf with
base::StringPrintf?

[Abhishek, 2014/08/04 15:17:44]

Done.

+#endif
+
+namespace content {
+
+inline bool IsASCIIAlpha(char ch) {
+  return (ch | 0x20) >= 'a' && (ch | 0x20) <= 'z';
+}
+
+inline bool IsNotASCIIAlpha(char ch) {
+  return !IsASCIIAlpha(ch);
+}
+
+std::string NormalizeLayoutTestURL(const std::string& url);
+
+}  // namespace content
+
+#endif  // CONTENT_SHELL_RENDERER_TEST_RUNNER_TEST_COMMON_H_