Refactor dmprof: remove no_dump flag for 'buckets' in load_basic_files.

tools/deep_memory_profiler/subcommands/buckets.py

 # Copyright 2013 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 logging
 import sys
 
 from lib.subcommand import SubCommand
 
 
 LOGGER = logging.getLogger('dmprof')
 
 
 class BucketsCommand(SubCommand):
   def __init__(self):
     super(BucketsCommand, self).__init__('Usage: %prog buckets <first-dump>')
 
   def do(self, sys_argv, out=sys.stdout):
     _, args = self._parse_args(sys_argv, 1)
     dump_path = args[1]
-    bucket_set = SubCommand.load_basic_files(dump_path, True, True)
+    (bucket_set, _) = SubCommand.load_basic_files(dump_path, True)
 
     BucketsCommand._output(bucket_set, out)
     return 0
 
   @staticmethod
   def _output(bucket_set, out):
     """Prints all buckets with resolving symbols.
 
     Args:
         bucket_set: A BucketSet object.
         out: An IO object to output.
     """
     for bucket_id, bucket in sorted(bucket_set):
       out.write('%d: %s\n' % (bucket_id, bucket))