Fix negative gtest filters for instrumentation tests.

build/android/pylib/instrumentation/instrumentation_test_instance.py

 # Copyright 2015 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 collections
 import copy
 import logging
 import os
 import pickle
 import re
@@ skipping 217 matching lines @@
     # Allow fully-qualified name as well as an omitted package.
     unqualified_class_test = {
       'class': t['class'].split('.')[-1],
       'method': t['method']
     }
     names = [
       GetTestName(t, sep='.'),
       GetTestName(unqualified_class_test, sep='.'),
       GetUniqueTestName(t, sep='.')
     ]
-    return unittest_util.FilterTestNames(names, test_filter)
+
+    pattern_groups = test_filter.split('-')
+    if len(pattern_groups) > 1:
+      negative_filter = pattern_groups[1]
+      if unittest_util.FilterTestNames(names, negative_filter):
+        return []
+
+    positive_filter = pattern_groups[0]
+    return unittest_util.FilterTestNames(names, positive_filter)
 
   def annotation_filter(all_annotations):
     if not annotations:
       return True
     return any_annotation_matches(annotations, all_annotations)
 
   def excluded_annotation_filter(all_annotations):
     if not excluded_annotations:
       return True
     return not any_annotation_matches(excluded_annotations,
@@ skipping 547 matching lines @@
 
   @staticmethod
   def GenerateTestResults(
       result_code, result_bundle, statuses, start_ms, duration_ms):
     return GenerateTestResults(result_code, result_bundle, statuses,
                                start_ms, duration_ms)
 
   #override
   def TearDown(self):
     pass