hack to repeat instrumentation test until failure

build/android/pylib/instrumentation/test_runner.py

Index: build/android/pylib/instrumentation/test_runner.py
diff --git a/build/android/pylib/instrumentation/test_runner.py b/build/android/pylib/instrumentation/test_runner.py
index 0f2e53fea733e032314bf5cee7ccd6d711e3df3b..82a093cffca8722609fdb7b6aeb62583cd2545d4 100644
--- a/build/android/pylib/instrumentation/test_runner.py
+++ b/build/android/pylib/instrumentation/test_runner.py
@@ -341,27 +341,30 @@ class TestRunner(base_test_runner.BaseTestRunner):
     start_ms = 0
     duration_ms = 0
     try:
-      self.TestSetup(test)
-
-      try:
-        self.device.GoHome()
-      except device_errors.CommandTimeoutError:
-        logging.exception('Failed to focus the launcher.')
-
-      time_ms = lambda: int(time.time() * 1000)
-      start_ms = time_ms()
-      raw_output = self._RunTest(test, timeout)
-      duration_ms = time_ms() - start_ms
-
-      # Parse the test output
-      result_code, result_bundle, statuses = (
-          instrumentation_test_instance.ParseAmInstrumentRawOutput(raw_output))
-      result = self._GenerateTestResult(
-          test, result_code, result_bundle, statuses, start_ms, duration_ms)
-      if local_device_instrumentation_test_run.DidPackageCrashOnDevice(
-          self.test_pkg.GetPackageName(), self.device):
-        result.SetType(base_test_result.ResultType.CRASH)
-      results.AddResult(result)
+      while True:
+          self.TestSetup(test)
+
+          try:
+            self.device.GoHome()
+          except device_errors.CommandTimeoutError:
+            logging.exception('Failed to focus the launcher.')
+
+          time_ms = lambda: int(time.time() * 1000)
+          start_ms = time_ms()
+          raw_output = self._RunTest(test, timeout)
+          duration_ms = time_ms() - start_ms
+
+          # Parse the test output
+          result_code, result_bundle, statuses = (
+              instrumentation_test_instance.ParseAmInstrumentRawOutput(raw_output))
+          result = self._GenerateTestResult(
+              test, result_code, result_bundle, statuses, start_ms, duration_ms)
+          if local_device_instrumentation_test_run.DidPackageCrashOnDevice(
+              self.test_pkg.GetPackageName(), self.device):
+            result.SetType(base_test_result.ResultType.CRASH)
+          results.AddResult(result)
+          if result.GetType() not in [base_test_result.ResultType.PASS, base_test_result.ResultType.SKIP]:
+            break
     except device_errors.CommandTimeoutError as e:
       results.AddResult(test_result.InstrumentationTestResult(
           test, base_test_result.ResultType.TIMEOUT, start_ms, duration_ms,