Updating swarming dimensions to add the Chrome-perf pool.

tools/perf/generate_perf_json.py

 #!/usr/bin/env python
 # Copyright 2016 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.
 
 """Script to generate chromium.perf.json and chromium.perf.fyi.json in
 the src/testing/buildbot directory. Maintaining these files by hand is
 too unwieldy.
 """
 
@@ skipping 180 matching lines @@
     'platform': platform,
     'num_device_shards': num_device_shards,
     'num_host_shards': num_host_shards,
     'target_bits': target_bits
   }
   if swarming:
     waterfall['testers'][name]['swarming_dimensions'] = []
     for dimension in swarming:
       waterfall['testers'][name]['swarming_dimensions'].append({
         'gpu': dimension['gpu'],
-        'os': dimension['os']
+        'os': dimension['os'],
+        'pool': 'Chrome-perf',
       })
     waterfall['testers'][name]['swarming'] = True
 
   return waterfall
 
 def get_fyi_waterfall_config():
   waterfall = {'builders':[], 'testers': {}}
   waterfall = add_tester(
     waterfall, 'Win 10 Low-End Perf Tests',
     'win-low-end-2-core', 'win',
@@ skipping 192 matching lines @@
 
 def main():
   waterfall = get_waterfall_config()
   fyi_waterfall = get_fyi_waterfall_config()
   generate_all_tests(fyi_waterfall, True)
   generate_all_tests(waterfall, False)
   return 0
 
 if __name__ == "__main__":
   sys.exit(main())