Introduce TracingController and TracingControllerBackend skeleton

tools/telemetry/telemetry/core/platform/tracing_options.py

Index: tools/telemetry/telemetry/core/platform/tracing_options.py
diff --git a/tools/telemetry/telemetry/core/platform/tracing_options.py b/tools/telemetry/telemetry/core/platform/tracing_options.py
new file mode 100644
index 0000000000000000000000000000000000000000..f2d747718bde5da4bc8264fad26e9cb05007642c
--- /dev/null
+++ b/tools/telemetry/telemetry/core/platform/tracing_options.py
@@ -0,0 +1,13 @@
+# Copyright 2014 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.
+
+class TracingOptions(object):
+  """Tracing options control which core tracing systems should be enabled.
+
+  This simply turns on those systems. If those systems have additional options,
+  e.g. what to trace, then they are typically configured by adding
+  categories to the TracingCategoryFilter.
+  """
+  def __init__(self):
+    self.enable_chrome_trace = False

[nednguyen, 2014/08/04 22:12:06]

Shouldn't we default chrome trace to True? Other tracing system can be default
to False.