[chromedriver] Separate stuff of chrome from chromedriver.

chrome/test/chromedriver/chrome_finder.h

-// Copyright (c) 2012 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_CHROME_FINDER_H_
-#define CHROME_TEST_CHROMEDRIVER_CHROME_FINDER_H_
-
-#include <vector>
-
-#include "base/callback_forward.h"
-
-namespace base {
-class FilePath;
-}
-
-// Gets the path to the default Chrome executable. Returns true on success.
-bool FindChrome(base::FilePath* browser_exe);
-
-namespace internal {
-
-bool FindExe(
-    const base::Callback<bool(const base::FilePath&)>& exists_func,
-    const std::vector<base::FilePath>& rel_paths,
-    const std::vector<base::FilePath>& locations,
-    base::FilePath* out_path);
-
-}  // namespace internal
-
-#endif  // CHROME_TEST_CHROMEDRIVER_CHROME_FINDER_H_