[chromedriver] Create release script and handle Chrome/ChromeDriver versions.

chrome/test/chromedriver/version.h

Index: chrome/test/chromedriver/version.h
diff --git a/chrome/test/chromedriver/version.h b/chrome/test/chromedriver/version.h
new file mode 100644
index 0000000000000000000000000000000000000000..82761667a8584abdd35f7e9c2cbbc588b3ee8f25
--- /dev/null
+++ b/chrome/test/chromedriver/version.h
@@ -0,0 +1,15 @@
+// Copyright (c) 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 CHROME_TEST_CHROMEDRIVER_VERSION_H_
+#define CHROME_TEST_CHROMEDRIVER_VERSION_H_
+
+#include <string>
+
+extern const char kChromeDriverVersion[];
+extern const int kMinimumSupportedChromeBuildNo;
+
+std::string GetMinimumSupportedChromeVersion();
+
+#endif  // CHROME_TEST_CHROMEDRIVER_VERSION_H_