Add FilePath to base namespace.

base/file_version_info.h

 // Copyright (c) 2011 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 BASE_FILE_VERSION_INFO_H__
 #define BASE_FILE_VERSION_INFO_H__
 
 #include "build/build_config.h"
 
 #if defined(OS_WIN)
 #include <windows.h>
 // http://blogs.msdn.com/oldnewthing/archive/2004/10/25/247180.aspx
 extern "C" IMAGE_DOS_HEADER __ImageBase;
 #endif  // OS_WIN
 
 #include <string>
 
 #include "base/base_export.h"
 #include "base/string16.h"
 
+namespace base {
 class FilePath;
+}
 
 // Provides an interface for accessing the version information for a file. This
 // is the information you access when you select a file in the Windows Explorer,
 // right-click select Properties, then click the Version tab, and on the Mac
 // when you select a file in the Finder and do a Get Info.
 //
 // This list of properties is straight out of Win32's VerQueryValue
 // <http://msdn.microsoft.com/en-us/library/ms647464.aspx> and the Mac
 // version returns values from the Info.plist as appropriate. TODO(avi): make
 // this a less-obvious Windows-ism.
 
 class FileVersionInfo {
  public:
   virtual ~FileVersionInfo() {}
 #if defined(OS_WIN) || defined(OS_MACOSX)
   // Creates a FileVersionInfo for the specified path. Returns NULL if something
   // goes wrong (typically the file does not exit or cannot be opened). The
   // returned object should be deleted when you are done with it.
   BASE_EXPORT static FileVersionInfo* CreateFileVersionInfo(
-      const FilePath& file_path);
+      const base::FilePath& file_path);
 #endif  // OS_WIN || OS_MACOSX
 
 #if defined(OS_WIN)
   // Creates a FileVersionInfo for the specified module. Returns NULL in case
   // of error. The returned object should be deleted when you are done with it.
   BASE_EXPORT static FileVersionInfo* CreateFileVersionInfoForModule(
       HMODULE module);
 
   // Creates a FileVersionInfo for the current module. Returns NULL in case
   // of error. The returned object should be deleted when you are done with it.
@@ skipping 24 matching lines @@
   virtual string16 original_filename() = 0;
   virtual string16 file_description() = 0;
   virtual string16 file_version() = 0;
   virtual string16 legal_copyright() = 0;
   virtual string16 legal_trademarks() = 0;
   virtual string16 last_change() = 0;
   virtual bool is_official_build() = 0;
 };
 
 #endif  // BASE_FILE_VERSION_INFO_H__