[Predator] Switch from anonymous dict to CrashData.

appengine/findit/crash/loglinear/changelist_features/min_distance.py

 # 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.
 
 import logging
 import math
 
 from crash.loglinear.changelist_classifier import StackInfo
 from crash.loglinear.feature import ChangedFile
 from crash.loglinear.feature import Feature
 from crash.loglinear.feature import FeatureValue
 from crash.loglinear.feature import LogLinearlyScaled
 from libs.gitiles.diff import ChangeType
 import libs.math.logarithms as lmath
 
 
-
 class ModifiedFrameInfo(object):
   """Represents the closest frame to a changelog which modified it.
 
   The "closest" means that the distance between crashed lines in the frame and
   touched lines in a changelog is minimum.
 
   Properties:
     distance (int or float('inf')): The distance between crashed lines and
       touched lines, if a changelog doesn't show in blame of the crashed file of
       the crashed version (either it didn't touch the crashed file or it got
@@ skipping 234 matching lines @@
 
     if not frame_index_to_changed_files: # pragma: no cover
       logging.warning('Found no changed files for suspect: %s', str(suspect))
       return []
 
     # Sort changed file by frame index.
     _, changed_files = zip(*sorted(frame_index_to_changed_files.iteritems(),
                                    key=lambda x: x[0]))
 
     return list(changed_files)