[Predator] Fix bug in min_distance after refactor and add back skip added/deleted deps.

appengine/findit/crash/scorers/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.
 
 """MinDistance scorer applies to MatchResult objects.
 
 It represents a heuristic rule:
   1. Highest score if the result changed the crashed lines.
   2. 0 score if changed lines are too far away from crashed lines.
 """
 
 import logging
 
 from crash.scorers.scorer import Scorer
 
 _MAX_DISTANCE = 50
 
 
 class MinDistance(Scorer):
 
   def __init__(self, max_distance=_MAX_DISTANCE):
     self.max_distance = max_distance
 
   def GetMetric(self, result):
     min_distance = float('inf')
     for analysis_info in result.file_to_analysis_info.itervalues():
-      min_distance = min(min_distance, analysis_info['min_distance'])
+      min_distance = min(min_distance, analysis_info.min_distance)
 
     return min_distance
 
   def Score(self, min_distance):
     if min_distance > self.max_distance:
       return 0
 
     if min_distance == 0:
       return 1
 
@@ skipping 19 matching lines @@
       }
     ]
     """
     if score == 0:
       return None
 
     index_to_changed_files = {}
 
     for file_path, analysis_info in result.file_to_analysis_info.iteritems():
       file_name = file_path.split('/')[-1]
-      frame = analysis_info['min_distance_frame']
+      frame = analysis_info.min_distance_frame
 
       # It is possible that a changelog doesn't show in the blame of a file,
       # in this case, treat the changelog as if it didn't change the file.
-      if analysis_info['min_distance'] == float('inf'):
+      if analysis_info.min_distance == float('inf'):
         continue
 
       index_to_changed_files[frame.index] = {
           'file': file_name,
           'blame_url': frame.BlameUrl(result.changelog.revision),
           'info': 'Minimum distance (LOC) %d, frame #%d' % (
-              analysis_info['min_distance'], frame.index)
+              analysis_info.min_distance, frame.index)
       }
 
     # Sort changed file by frame index.
     _, changed_files = zip(*sorted(index_to_changed_files.items(),
                                    key=lambda x: x[0]))
 
     return list(changed_files)