clovis: Identify prefetchable resources from dependencies and tracing.

tools/android/loading/activity_lens.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.
 
 """Gives a picture of the CPU activity between timestamps.
 
 When executed as a script, takes a loading trace, and prints the activity
 breakdown for the request dependencies.
 """
 
@@ skipping 11 matching lines @@
 
   def __init__(self, trace):
     """Initializes an instance of ActivityLens.
 
     Args:
       trace: (LoadingTrace) loading trace.
     """
     self._trace = trace
     events = trace.tracing_track.GetEvents()
     self._renderer_main_pid_tid = self._GetRendererMainThreadId(events)
-    self._tracing = self._trace.tracing_track.TracingTrackForThread(
-        self._renderer_main_pid_tid)
+    self._tracing = self._trace.tracing_track.Filter(
+        *self._renderer_main_pid_tid)
 
   @classmethod
   def _GetRendererMainThreadId(cls, events):
     """Returns the most active main renderer thread.
 
     Several renderers may be running concurrently, but we assume that only one
     of them is busy during the time covered by the loading trace.. It can be
     selected by looking at the number of trace events generated.
 
     Args:
@@ skipping 231 matching lines @@
 
   filename = sys.argv[1]
   json_dict = json.load(open(filename))
   loading_trace = loading_trace.LoadingTrace.FromJsonDict(json_dict)
   activity_lens = ActivityLens(loading_trace)
   dependencies_lens = request_dependencies_lens.RequestDependencyLens(
       loading_trace)
   deps = dependencies_lens.GetRequestDependencies()
   for requests_dep in deps:
     print activity_lens.GenerateEdgeActivity(requests_dep)