[Telemetry] Platform-level tracing

tools/telemetry/telemetry/timeline/tracing_config.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 json
 
 
 class TracingConfig(object):
   """Tracing config is the configuration for Chrome tracing.
 
   This produces the trace config JSON string for Chrome tracing. For the details
   about the JSON string format, see base/trace_event/trace_config.h.
   """
   def __init__(self, tracing_options, tracing_category_filter):
     self._tracing_options = tracing_options
     self._tracing_category_filter = tracing_category_filter
 
+  @property
+  def tracing_options(self):
+    return self._tracing_options
+
+  @property
+  def tracing_category_filter(self):
+    return self._tracing_category_filter
+
   def GetTraceConfigJsonString(self):
     result = {}
     result.update(self._tracing_options.GetDictForChromeTracing())
     result.update(self._tracing_category_filter.GetDictForChromeTracing())
     return json.dumps(result, sort_keys=True)