[Telemetry] Add 'check_independent' command to benchmark_runner

telemetry/telemetry/testdata/run_benchmark_integration_test_benchmarks.py

Index: telemetry/telemetry/testdata/run_benchmark_integration_test_benchmarks.py
diff --git a/telemetry/telemetry/testdata/run_benchmark_integration_test_benchmarks.py b/telemetry/telemetry/testdata/run_benchmark_integration_test_benchmarks.py
new file mode 100644
index 0000000000000000000000000000000000000000..a91a1d9a852807fd85f72b6272f0872553ac2556
--- /dev/null
+++ b/telemetry/telemetry/testdata/run_benchmark_integration_test_benchmarks.py
@@ -0,0 +1,24 @@
+# Copyright 2016 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 telemetry import benchmark
+
+class IndependentBenchmark(benchmark.Benchmark):
+  @classmethod
+  def Name(cls):
+    return 'independent'
+
+  @classmethod
+  def ShouldTearDownStateAfterEachStoryRun(cls):
+    return True
+
+
+class DependentBenchmark(benchmark.Benchmark):
+  @classmethod
+  def Name(cls):
+    return 'dependent'
+
+  @classmethod
+  def ShouldTearDownStateAfterEachStoryRun(cls):
+    return False