User interruption should still create results.html for run-webkit-tests.

Tools/Scripts/webkitpy/layout_tests/controllers/layout_test_runner.py

 # Copyright (C) 2011 Google Inc. All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 # notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
 # copyright notice, this list of conditions and the following disclaimer
@@ skipping 102 matching lines @@
         start_time = time.time()
         try:
             with message_pool.get(self, self._worker_factory, num_workers, self._port.worker_startup_delay_secs(), self._port.host) as pool:
                 pool.run(('test_list', shard.name, shard.test_inputs) for shard in all_shards)
         except TestRunInterruptedException, e:
             _log.warning(e.reason)
             run_results.interrupted = True
         except KeyboardInterrupt:
             self._printer.flush()
             self._printer.writeln('Interrupted, exiting ...')
-            raise
+            # Mark execution got interrupted and return results for tests executed till now.
+            run_results.interrupted = True
         except Exception, e:
             _log.debug('%s("%s") raised, exiting' % (e.__class__.__name__, str(e)))
             raise
         finally:
             run_results.run_time = time.time() - start_time
 
         return run_results
 
     def _worker_factory(self, worker_connection):
         results_directory = self._results_directory
@@ skipping 324 matching lines @@
         def split_at(seq, index):
             return (seq[:index], seq[index:])
 
         num_old_per_new = divide_and_round_up(len(old_shards), max_new_shards)
         new_shards = []
         remaining_shards = old_shards
         while remaining_shards:
             some_shards, remaining_shards = split_at(remaining_shards, num_old_per_new)
             new_shards.append(TestShard('%s_%d' % (shard_name_prefix, len(new_shards) + 1), extract_and_flatten(some_shards)))
         return new_shards