[telemetry] Implement first version of timeline based measurement

tools/perf/metrics/timeline_interaction_record.py

Index: tools/perf/metrics/timeline_interaction_record.py
diff --git a/tools/perf/metrics/timeline_interaction_record.py b/tools/perf/metrics/timeline_interaction_record.py
new file mode 100644
index 0000000000000000000000000000000000000000..3ec90025ae25b300abe0d9c4b05c3ef362b5d41d
--- /dev/null
+++ b/tools/perf/metrics/timeline_interaction_record.py
@@ -0,0 +1,38 @@
+# 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.
+
+import re
+
+
+def IsTimelineInteractionRecord(event_name):
+  return event_name.startswith('Interaction.')
+
+
+class TimelineInteractionRecord(object):
+  def __init__(self, event):
+    self.start = event.start
+    self.end = event.end
+
+    m = re.match('Interaction\.(.+)\/(.+)', event.name)
+    if m:
+      self.logical_name = m.group(1)
+      if m.group(1) != '':
+        flags = m.group(2).split(',')
+      else:
+        flags = []
+    else:
+      m = re.match('Interaction\.(.+)', event.name)
+      assert m
+      self.logical_name = m.group(1)
+      flags = []
+
+    for f in flags:
+      if not f in ('is_smooth', 'is_loading_resources'):
+        raise Exception(
+          'Unrecognized flag in timeline Interaction record: %s' % f)
+    self.is_smooth = 'is_smooth' in flags
+    self.is_loading_resources = 'is_loading_resources' in flags
+
+  def GetResultNameFor(self, result_name):
+    return "%s/%s" % (self.logical_name, result_name)