tools/android/loading: rename tracing to tracing_track

tools/android/loading/tracing_track_unittest.py

 # Copyright 2016 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 collections
 import copy
 import logging
 import operator
 import unittest
 
 import devtools_monitor
 
-from tracing import (Event, TracingTrack, _IntervalTree)
+from tracing_track import (Event, TracingTrack, _IntervalTree)
 
 
 class TracingTrackTestCase(unittest.TestCase):
   _MIXED_EVENTS = [
       {'ts': 3, 'ph': 'N', 'id': 1, 'args': {'name': 'A'}},
       {'ts': 5, 'ph': 'X', 'dur': 1, 'args': {'name': 'B'}},
       {'ts': 7, 'ph': 'D', 'id': 1},
       {'ts': 10, 'ph': 'B', 'args': {'name': 'D'}},
       {'ts': 10, 'ph': 'b', 'cat': 'X', 'id': 1, 'args': {'name': 'C'}},
       {'ts': 11, 'ph': 'e', 'cat': 'X', 'id': 1},
@@ skipping 460 matching lines @@
                    'cat': 'bar,baz,bizbiz',
                    'ph': 'X',
                    'ts': 0, 'dur': 0})
     self.assertTrue(event.Matches('bar', 'foo'))
     self.assertTrue(event.Matches('baz', 'foo'))
     self.assertFalse(event.Matches('bar', 'biz'))
     self.assertFalse(event.Matches('biz', 'foo'))
 
 if __name__ == '__main__':
   unittest.main()