Fix negative gtest filters for instrumentation tests.

build/android/pylib/instrumentation/instrumentation_test_instance_test.py

Index: build/android/pylib/instrumentation/instrumentation_test_instance_test.py
diff --git a/build/android/pylib/instrumentation/instrumentation_test_instance_test.py b/build/android/pylib/instrumentation/instrumentation_test_instance_test.py
index c7f609ca84e533b0fc4b358a95081e1d2aa1c4d3..10fe95c738e0cd67431c204a47106b7724582cfe 100755
--- a/build/android/pylib/instrumentation/instrumentation_test_instance_test.py
+++ b/build/android/pylib/instrumentation/instrumentation_test_instance_test.py
@@ -187,7 +187,6 @@ class InstrumentationTestInstanceTest(unittest.TestCase):
 
     self.assertEquals(actual_tests, expected_tests)
 
-  @unittest.skip('crbug.com/623047')
   def testGetTests_negativeGtestFilter(self):
     o = self.createTestInstance()
     raw_tests = [
@@ -217,9 +216,6 @@ class InstrumentationTestInstanceTest(unittest.TestCase):
       }
     ]
 
-    o._GetTestsFromPickle = mock.MagicMock(return_value=raw_tests)
-    o._test_filter = '*-org.chromium.test.SampleTest.testMethod1'
-    o._test_jar = 'path/to/test.jar'
     expected_tests = [
       {
         'annotations': {
@@ -239,7 +235,12 @@ class InstrumentationTestInstanceTest(unittest.TestCase):
       },
     ]
 
-    actual_tests = o.GetTests()
+    o._test_filter = '*-org.chromium.test.SampleTest.testMethod1'
+    o._test_jar = 'path/to/test.jar'
+    with mock.patch(_INSTRUMENTATION_TEST_INSTANCE_PATH % '_GetTestsFromPickle',
+                    return_value=raw_tests):
+      actual_tests = o.GetTests()
+
     self.assertEquals(actual_tests, expected_tests)
 
   def testGetTests_annotationFilter(self):