Refactor how we fetch Telemetry deps conditionally

tools/perf/fetch_benchmark_deps.py

 #!/usr/bin/env python
 # 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.
 
 """This module fetches and prints the dependencies given a benchmark."""
 
 import argparse
 import os
 import sys
@@ skipping 80 matching lines @@
     if not benchmark:
       raise ValueError('No such benchmark: %s' % options.benchmark_name)
     FetchDepsForBenchmark(benchmark, output)
   else:
     if not options.force:
       raw_input(
           'No benchmark name is specified. Fetching all benchmark deps. '
           'Press enter to continue...')
     for b in benchmark_finders.GetAllBenchmarks():
       print >> output, ('Fetch dependencies for benchmark %s:'
-                        % benchmark.Name())
+                        % b.Name())
       FetchDepsForBenchmark(b, output)
 
 if __name__ == '__main__':
   main(sys.argv[1:], sys.stdout)