make version of ts_mon compatible with appengine

infra_libs/ts_mon/test/metrics_test.py

 # Copyright 2015 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import sys
 import textwrap
 import unittest
 
 import mock
 
 from monacq.proto import metrics_pb2
 
-from infra_libs.ts_mon import distribution
-from infra_libs.ts_mon import errors
 from infra_libs.ts_mon import interface
 from infra_libs.ts_mon import metrics
-from infra_libs.ts_mon import targets
+from infra_libs.ts_mon.gae import distribution
+from infra_libs.ts_mon.gae import errors
+from infra_libs.ts_mon.gae import targets
 
 
 class FakeState(interface.State):
   def __init__(self):
     super(FakeState, self).__init__()
     self.global_monitor = mock.Mock()
 
 
 class MetricTestBase(unittest.TestCase):
   def setUp(self):
@@ skipping 578 matching lines @@
   def test_start_timestamp(self):
     t = targets.DeviceTarget('reg', 'net', 'host')
     m = metrics.CumulativeDistributionMetric(
         'test', target=t, time_fn=lambda: 1234)
     m.add(1)
     m.add(5)
     m.add(25)
     p = metrics_pb2.MetricsCollection()
     m.serialize_to(p)
     self.assertEquals(1234000000, p.data[0].start_timestamp_us)