Add FilePath to base namespace.

chrome/test/chromedriver/chrome_launcher.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_LAUNCHER_H_
 #define CHROME_TEST_CHROMEDRIVER_CHROME_LAUNCHER_H_
 
 #include "base/memory/scoped_ptr.h"
 
 class Chrome;
+class Status;
+
+namespace base {
 class FilePath;
-class Status;
+}
 
 // Launches Chrome. Must be thread safe.
 class ChromeLauncher {
  public:
   virtual ~ChromeLauncher() {}
 
   // Launches Chrome found at the given path. If the path
   // is empty, the default Chrome binary is to be used.
-  virtual Status Launch(const FilePath& chrome_exe,
+  virtual Status Launch(const base::FilePath& chrome_exe,
                         scoped_ptr<Chrome>* chrome) = 0;
 };
 
 #endif  // CHROME_TEST_CHROMEDRIVER_CHROME_LAUNCHER_H_