[Android] Generate html file for test runner trace instead of json.

build/android/pylib/local/device/local_device_perf_test_run.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 contextlib
 import io
 import json
 import logging
 import os
@@ skipping 407 matching lines @@
     except IOError as e:
       logging.error('Unable to find %s [%s]', devices_path, e)
       devices = active_devices
     return sorted(devices)
 
   #override
   def RunTests(self):
     # Affinitize the tests.
     if self._test_instance.trace_output:
       assert not trace_event.trace_is_enabled(), 'Tracing already running.'
-      trace_event.trace_enable(self._test_instance.trace_output)
+      trace_event.trace_enable(self._test_instance.trace_output + '.json')
     self._SplitTestsByAffinity()
     if not self._test_buckets and not self._no_device_tests:
       raise local_device_test_run.NoTestsError()
 
     def run_no_devices_tests():
       if not self._no_device_tests:
         return []
       s = HostTestShard(self._env, self._test_instance, self._no_device_tests,
                         retries=3, timeout=self._timeout)
       return [s.RunTestsOnShard()]
@@ skipping 20 matching lines @@
       device_indices = range(min(len(self._devices), len(self._test_buckets)))
       shards = parallelizer.Parallelizer(device_indices).pMap(
           device_shard_helper)
       return [x for x in shards.pGet(self._timeout) if x is not None]
 
     host_test_results, device_test_results = reraiser_thread.RunAsync(
         [run_no_devices_tests, run_devices_tests])
     if self._test_instance.trace_output:
       assert trace_event.trace_is_enabled(), 'Tracing not running.'
       trace_event.trace_disable()
+      local_device_test_run.LocalDeviceTestRun._JsonToTrace(
+          self._test_instance.trace_output + '.json',
+          self._test_instance.trace_output)
     return host_test_results + device_test_results
 
   # override
   def TestPackage(self):
     return 'perf'
 
   # override
   def _CreateShards(self, _tests):
     raise NotImplementedError
 
@@ skipping 52 matching lines @@
   # override
   def _RunTest(self, _device, _test):
     raise NotImplementedError
 
 
 class TestDictVersionError(Exception):
   pass
 
 class PerfTestRunGetStepsError(Exception):
   pass