[Android] Keep track of unknown test results at the TestRunner layer.

build/android/pylib/gtest/single_test_runner.py

Index: build/android/pylib/gtest/single_test_runner.py
diff --git a/build/android/pylib/gtest/single_test_runner.py b/build/android/pylib/gtest/single_test_runner.py
index 43959ee74250a3fa36973810a615619aca31aacf..61521e01bb2f2d0b5260d8b0bb2f2190149ee06b 100644
--- a/build/android/pylib/gtest/single_test_runner.py
+++ b/build/android/pylib/gtest/single_test_runner.py
@@ -253,17 +253,17 @@ class SingleTestRunner(BaseTestRunner):
       self.test_results = self.test_package.RunTestsAndListResults()
     except errors.DeviceUnresponsiveError as e:
       # Make sure this device is not attached
+      logging.warning(e)
       if android_commands.IsDeviceAttached(self.device):
         raise e
-
-      # TODO(frankf): We should report these as "skipped" not "failures".
-      # Wrap the results
-      logging.warning(e)
-      failed_tests = []
-      for t in self._gtest_filter.split(':'):
-        failed_tests += [BaseTestResult(t, '')]
-      self.test_results = TestResults.FromRun(
-          failed=failed_tests, device_exception=self.device)
+      self.test_results.device_exception = device_exception
+    # Calculate unknown test results.
+    finally:
+      # TODO(frankf): Do not break TestResults encapsulation.
+      all_tests = set(self._gtest_filter.split(':'))
+      all_tests_ran = set([t.name for t in self.test_results.GetAll()])
+      unknown_tests = all_tests - all_tests_ran
+      self.test_results.unknown = [BaseTestResult(t, '') for t in unknown_tests]
 
     return self.test_results