Add TODOs for broken build code in aggregate_vector_icons.

ui/gfx/vector_icons/aggregate_vector_icons.py

 # Copyright 2015 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.
 
 import fileinput
 import glob
 import optparse
 import os
 import textwrap
 
 
+# TODO(brettw) bug 535386: This should not take a directory as an input, but
+# rather a response file listing the inputs or sometimes the build will be
+# incorrect.
+
 def AggregateVectorIcons(working_directory, output_cc, output_h):
   """Compiles all .icon files in a directory into two C++ files.
 
   Args:
       working_directory: The path to the directory that holds the .icon files
           and C++ templates.
       output_cc: The path that should be used to write the .cc file.
       output_h: The path that should be used to write the .h file.
   """
 
@@ skipping 55 matching lines @@
 
   (options, args) = parser.parse_args()
 
   AggregateVectorIcons(options.working_directory,
                        options.output_cc,
                        options.output_h)
 
 
 if __name__ == "__main__":
   main()