[Android] Implement perf tests to platform mode.

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

Index: build/android/pylib/local/device/local_device_test_run.py
diff --git a/build/android/pylib/local/device/local_device_test_run.py b/build/android/pylib/local/device/local_device_test_run.py
index 544fbf0e41107c40545c0875c8c99e30a963dbf5..49506b682ca2109cdba7309bd8cb6d455369d863 100644
--- a/build/android/pylib/local/device/local_device_test_run.py
+++ b/build/android/pylib/local/device/local_device_test_run.py
@@ -200,3 +200,6 @@ class LocalDeviceTestRun(test_run.TestRun):
 
   def _ShouldShard(self):
     raise NotImplementedError
+
+class NoTestsError(Exception):

[jbudorick, 2016/06/28 10:27:33]

If we're raising this when we have no perf tests, we should probably also raise
it when we have no gtests or instrumentation tests.

[rnephew (Reviews Here), 2016/06/29 22:27:19]

Would you like that in this CL, or in a CL after this lands?

[jbudorick, 2016/07/01 14:20:09]

hm, probably a separate CL after this lands.

+  """Error for when no tests are found."""