Disable flaky SingleSampleMetricsFactoryImplTest.MultithreadedMetrics test

components/metrics/single_sample_metrics_factory_impl_unittest.cc

 // Copyright 2017 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.
 
 #include "components/metrics/single_sample_metrics_factory_impl.h"
 
 #include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
 #include "base/test/gtest_util.h"
 #include "base/test/histogram_tester.h"
@@ skipping 113 matching lines @@
   // Verify construction implicitly by requesting a histogram with the same
   // parameters; this test relies on the fact that histogram objects are unique
   // per name. Different parameters will result in a nullptr being returned.
   EXPECT_FALSE(base::Histogram::FactoryGet(kMetricName, 1, 3, 3,
                                            base::HistogramBase::kNoFlags));
   EXPECT_TRUE(base::Histogram::FactoryGet(
       kMetricName, kMin, kMax, kBucketCount,
       base::HistogramBase::kUmaTargetedHistogramFlag));
 }
 
-TEST_F(SingleSampleMetricsFactoryImplTest, MultithreadedMetrics) {
+// Flaky on Android N5X builders. https://crbug.com/719497
+#if defined(OS_ANDROID)
+#define MAYBE_MultithreadedMetrics DISABLED_MultithreadedMetrics
+#else
+#define MAYBE_MultithreadedMetrics MultithreadedMetrics
+#endif
+TEST_F(SingleSampleMetricsFactoryImplTest, MAYBE_MultithreadedMetrics) {
   base::HistogramTester tester;
   std::unique_ptr<base::SingleSampleMetric> metric =
       factory_->CreateCustomCountsMetric(kMetricName, kMin, kMax, kBucketCount);
   EXPECT_EQ(1u, provider_count_);
 
   StartThread();
 
   std::unique_ptr<base::SingleSampleMetric> threaded_metric =
       CreateMetricOnThread();
   ASSERT_TRUE(threaded_metric);
@@ skipping 29 matching lines @@
         FROM_HERE, base::Bind(&base::DoNothing), run_loop.QuitClosure());
     run_loop.Run();
   }
 
   metric.reset();
   base::RunLoop().RunUntilIdle();
   tester.ExpectUniqueSample(kMetricName, kSample, 2);
 }
 
 }  // namespace metrics