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diff --git a/chrome/app/client_util.h b/chrome/app/client_util.h
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+// Copyright 2008, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//    * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//    * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//    * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// This file defines utility functions that can report details about the
+// host operating environment.
+
+#ifndef CHROME_APP_CLIENT_UTIL_H_
+#define CHROME_APP_CLIENT_UTIL_H_
+
+#include <windows.h>
+
+#include "sandbox/src/sandbox_factory.h"
+
+namespace client_util {
+typedef int (*DLL_MAIN)(HINSTANCE instance, sandbox::SandboxInterfaceInfo*,
+                        TCHAR*, int);
+
+extern const wchar_t kProductVersionKey[];
+
+// Returns true if file specified by file_path exists
+bool FileExists(const wchar_t* const file_path);
+
+// Returns Chromium version after reading it from reg_key registry key. Uses
+// exe_path to detemine registry root key (HKLM/HKCU). Note it is the
+// responsibility of caller to free *version when function is successful.
+bool GetChromiumVersion(const wchar_t* const exe_path,
+                        const wchar_t* const reg_key_path,
+                        wchar_t** version);
+
+// Returns the path to the exe (without the file name) that called this
+// function. The buffer should already be allocated (ideally of MAX_PATH size).
+void GetExecutablePath(wchar_t* exe_path);
+
+// Returns false if this is system level install (exe_path is same as
+// Program Files path) else returns true.
+bool IsUserModeInstall(const wchar_t* const exe_path);
+}  // namespace client_util
+
+#endif  // CHROME_APP_CLIENT_UTIL_H_