Coverage script: fix missing data

tools/llvm_coverage_run.py

 #!/usr/bin/env python
 # Copyright (c) 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.
 
 
 """Run the given command through LLVM's coverage tools."""
 
 
 import argparse
@@ skipping 144 matching lines @@
   # Parse args.
   parser = argparse.ArgumentParser()
   parser.add_argument('--outResultsFile')
   parser.add_argument(
       '--key', metavar='key_or_value', nargs='+',
       help='key/value pairs identifying this bot.')
   parser.add_argument(
       '--properties', metavar='key_or_value', nargs='+',
       help='key/value pairs representing properties of this build.')
   args, cmd = parser.parse_known_args()
+
+  # We still need to pass the args we stripped out to DM.
+  cmd.append('--key')
+  cmd.extend(args.key)
+  cmd.append('--properties')
+  cmd.extend(args.properties)
+
+  # Parse the key and properties for use in the nanobench JSON output.
   key = _parse_key_value(args.key)
   properties = _parse_key_value(args.properties)
 
   # Run coverage.
   results = run_coverage(cmd)
 
   # Write results.
   format_results = _nanobench_json(results, properties, key)
   if args.outResultsFile:
     with open(args.outResultsFile, 'w') as f:
       json.dump(format_results, f)
   else:
     print json.dumps(format_results, indent=4, sort_keys=True)
 
 
 if __name__ == '__main__':
   main()