Revert of [Android] Disable mid perf run device recovery on n7 devices.

build/android/pylib/local/device/local_device_perf_test_run.py

Index: build/android/pylib/local/device/local_device_perf_test_run.py
diff --git a/build/android/pylib/local/device/local_device_perf_test_run.py b/build/android/pylib/local/device/local_device_perf_test_run.py
index 0dbafd5a104f60f033eacca23a33a2f343f79102..b34c3603891edf6af51085fa320c6a10b1491dfa 100644
--- a/build/android/pylib/local/device/local_device_perf_test_run.py
+++ b/build/android/pylib/local/device/local_device_perf_test_run.py
@@ -252,12 +252,7 @@
           self._TestTearDown()
           if result_type != base_test_result.ResultType.PASS:
             try:
-              # TODO(rnephew): Possible problem when restarting on N7 devices.
-              # Determine if this is true. crbug.com/667470
-              if 'Nexus 7' not in self._device.product_model:
-                device_recovery.RecoverDevice(self._device, self._env.blacklist)
-              else:
-                logging.critical('Not attempting device recovery.')
+              device_recovery.RecoverDevice(self._device, self._env.blacklist)
             except device_errors.CommandTimeoutError:
               logging.exception(
                   'Device failed to recover after failing %s.', test)