(Reland) Added tombstones in instrumentation tests results.

build/android/pylib/instrumentation/test_result.py

 # Copyright (c) 2012 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.
 
 from pylib.base import base_test_result
 
 
 class InstrumentationTestResult(base_test_result.BaseTestResult):
   """Result information for a single instrumentation test."""
 
@@ skipping 10 matching lines @@
     super(InstrumentationTestResult, self).__init__(
         full_name, test_type, dur, log)
     name_pieces = full_name.rsplit('#')
     if len(name_pieces) > 1:
       self._test_name = name_pieces[1]
       self._class_name = name_pieces[0]
     else:
       self._class_name = full_name
       self._test_name = full_name
     self._start_date = start_date
+    self._tombstones = None
+
+  def SetTombstones(self, tombstones):
+    self._tombstones = tombstones