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

content/shell/renderer/test_runner/test_common.h

Index: content/shell/renderer/test_runner/test_common.h
diff --git a/content/shell/renderer/test_runner/test_common.h b/content/shell/renderer/test_runner/test_common.h
new file mode 100644
index 0000000000000000000000000000000000000000..a727ee8ae9b9e658e4f6eaa76c33607e44cb085f
--- /dev/null
+++ b/content/shell/renderer/test_runner/test_common.h
@@ -0,0 +1,24 @@
+// 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 <string>
+
+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_