[Findit] Pass changed files info to Fracas, 2 face design.

appengine/findit/crash/scorers/top_frame_index.py

Index: appengine/findit/crash/scorers/top_frame_index.py
diff --git a/appengine/findit/crash/scorers/top_frame_index.py b/appengine/findit/crash/scorers/top_frame_index.py
index ae0e06c794701f2d0abc7df4923fd74a20b3ac50..77160e9f83eee07f867fc8e9046a973a73775aa6 100644
--- a/appengine/findit/crash/scorers/top_frame_index.py
+++ b/appengine/findit/crash/scorers/top_frame_index.py
@@ -40,6 +40,10 @@ class TopFrameIndex(Scorer):
 
   def Reason(self, top_frame_index, score):
     if score == 0:
-      return ''
+      return None
+
+    return self.name, score, 'Top frame is #%d' % top_frame_index
 
-    return 'Modified top crashing frame is #%d' % top_frame_index
+  def ChangedFiles(self, result):
+    # There is no changed file infos that top frame scorer can provide.
+    return None