tools/android/loading: rename tracing to tracing_track

tools/android/loading/test_utils.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.
 
 """Common utilities used in unit tests, within this directory."""
 
 import clovis_constants
 import dependency_graph
 import devtools_monitor
 import loading_trace
 import page_track
 import request_track
-import tracing
+import tracing_track
 import user_satisfied_lens
 
 
 class FakeRequestTrack(devtools_monitor.Track):
   def __init__(self, events):
     super(FakeRequestTrack, self).__init__(None)
     self._events = events
     for e in self._events:
       e.timing.request_time = e.timestamp
 
@@ skipping 110 matching lines @@
       'requestTime': start_time / 1000.0}
   return MakeRequestWithTiming(
       url, source_url, timing_dict, magic_content_type, initiator_type)
 
 
 def LoadingTraceFromEvents(requests, page_events=None, trace_events=None):
   """Returns a LoadingTrace instance from various events."""
   request = FakeRequestTrack(requests)
   page_event_track = FakePageTrack(page_events if page_events else [])
   if trace_events is not None:
-    tracing_track = tracing.TracingTrack(None,
+    track = tracing_track.TracingTrack(None,
         clovis_constants.DEFAULT_CATEGORIES)
-    tracing_track.Handle('Tracing.dataCollected',
-                         {'params': {'value': [e for e in trace_events]}})
+    track.Handle('Tracing.dataCollected',
+                 {'params': {'value': [e for e in trace_events]}})
   else:
-    tracing_track = None
+    track = None
   return loading_trace.LoadingTrace(
-      None, None, page_event_track, request, tracing_track)
+      None, None, page_event_track, request, track)
 
 
 class SimpleLens(object):
   """A simple replacement for RequestDependencyLens.
 
   Uses only the initiator url of a request for determining a dependency.
   """
   def __init__(self, trace):
     self._trace = trace
 
@@ skipping 86 matching lines @@
     self._request_index += 1
     return rq
 
   def CreateTrace(self, requests, events, main_frame_id):
     page_event = {'method': 'Page.frameStartedLoading',
                   'frame_id': main_frame_id}
     trace = LoadingTraceFromEvents(
         requests, trace_events=events, page_events=[page_event])
     trace.tracing_track.SetMainFrameID(main_frame_id)
     return trace