Chrome frame compile fix, take 2.

chrome_frame/chrome_launcher.h

 // Copyright (c) 2009 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_FRAME_CHROME_LAUNCHER_H_
 #define CHROME_FRAME_CHROME_LAUNCHER_H_
 
 #include <string>
 
 class CommandLine;
@@ skipping 17 matching lines @@
 // Logs a warning for any flags that were passed that are not allowed to be
 // invoked by Low Integrity.
 void SanitizeCommandLine(const CommandLine& original, CommandLine* sanitized);
 
 // Given a command-line without an initial program part, launch our associated
 // chrome.exe with a sanitized version of that command line. Returns true iff 
 // successful.
 bool SanitizeAndLaunchChrome(const wchar_t* command_line);
 
 // Returns the full path to the Chrome executable.
-std::wstring GetChromeExecutablePath();
+FilePath GetChromeExecutablePath();
 
 // The type of the CfLaunchChrome entrypoint exported from this DLL.
 typedef int (__stdcall *CfLaunchChromeProc)();
 
 }  // namespace chrome_launcher
 
 #endif  // CHROME_FRAME_CHROME_LAUNCHER_H_