Replace FilePath with base::FilePath in some more top level directories.

tools/generate_library_loader/generate_library_loader.py

 #!/usr/bin/env python
 # 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.
 
 """
 Creates a library loader (a header and implementation file),
 which is a wrapper for dlopen or direct linking with given library.
 
 The loader makes it possible to have the same client code for both cases,
@@ skipping 81 matching lines @@
   CleanUp(loaded_);
 }
 
 bool %(class_name)s::Load(const std::string& library_name) {
   if (loaded_) {
     NOTREACHED();
     return false;
   }
 
 #if defined(%(unique_prefix)s_DLOPEN)
-  library_ = base::LoadNativeLibrary(FilePath(library_name), NULL);
+  library_ = base::LoadNativeLibrary(base::FilePath(library_name), NULL);
   if (!library_)
     return false;
 #endif
 
 %(member_init)s
 
   loaded_ = true;
   return true;
 }
 
@@ skipping 134 matching lines @@
   impl_file = open(os.path.join(source_tree_root, options.output_cc), 'w')
   try:
     impl_file.write(impl_contents)
   finally:
     impl_file.close()
 
   return 0
 
 if __name__ == '__main__':
   sys.exit(main())