[DO NOT COMMIT] Refactor systrace to support new clock sync design

systrace/systrace/systrace_agent.py

Index: systrace/systrace/systrace_agent.py
diff --git a/systrace/systrace/systrace_agent.py b/systrace/systrace/systrace_agent.py
deleted file mode 100644
index bca5e5e0bb38858bd82187671d5aa8ccbb9c1486..0000000000000000000000000000000000000000
--- a/systrace/systrace/systrace_agent.py
+++ /dev/null
@@ -1,62 +0,0 @@
-# Copyright (c) 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.
-
-
-class SystraceAgent(object):
-  """The base class for systrace agents.
-
-  A systrace agent contains the command-line options and trace categories to
-  capture. Each systrace agent has its own tracing implementation.
-  """
-
-  def __init__(self, options, categories):
-    """Initialize a systrace agent.
-
-    Args:
-      options: The command-line options.
-      categories: The trace categories to capture.
-    """
-    self._options = options
-    self._categories = categories
-
-  def start(self):
-    """Start tracing.
-    """
-    raise NotImplementedError()
-
-  def collect_result(self):
-    """Collect the result of tracing.
-
-    This function will block while collecting the result. For sync mode, it
-    reads the data, e.g., from stdout, until it finishes. For async mode, it
-    blocks until the agent is stopped and the data is ready.
-    """
-    raise NotImplementedError()
-
-  def expect_trace(self):
-    """Check if the agent is returning a trace or not.
-
-    This will be determined in collect_result().
-    Returns:
-      Whether the agent is expecting a trace or not.
-    """
-    raise NotImplementedError()
-
-  def get_trace_data(self):
-    """Get the trace data.
-
-    Returns:
-      The trace data.
-    """
-    raise NotImplementedError()
-
-  def get_class_name(self):
-    """Get the class name
-
-    The class name is used to identify the trace type when the trace is written
-    to the html file
-    Returns:
-      The class name.
-    """
-    raise NotImplementedError()