Retry tests on other bots if the device is unresponsive/offline

build/android/pylib/test_result.py

Index: build/android/pylib/test_result.py
diff --git a/build/android/pylib/test_result.py b/build/android/pylib/test_result.py
index 31a546acac8a4c6d33bdc32d3c82f582a411e800..00d139caf8e3592815adfdca218d0e2cad809a02 100644
--- a/build/android/pylib/test_result.py
+++ b/build/android/pylib/test_result.py
@@ -54,16 +54,18 @@ class TestResults(object):
     self.unknown = []
     self.timed_out = False
     self.overall_fail = False
+    self.device_exception = None
 
   @staticmethod
   def FromRun(ok=None, failed=None, crashed=None, timed_out=False,
-              overall_fail=False):
+              overall_fail=False, device_exception=None):
     ret = TestResults()
     ret.ok = ok or []
     ret.failed = failed or []
     ret.crashed = crashed or []
     ret.timed_out = timed_out
     ret.overall_fail = overall_fail
+    ret.device_exception = device_exception
     return ret
 
   @staticmethod
@@ -109,6 +111,10 @@ class TestResults(object):
     results.failed.append(exc_result)
     return results
 
+  @staticmethod
+  def DeviceExceptions(results):
+    return set(filter(lambda t: t.device_exception, results))
+
   def _Log(self, sorted_list):
     for t in sorted_list:
       logging.critical(t.name)