Add responsiveness_metric for timeline_based_measurement

tools/telemetry/telemetry/core/timeline/event.py

Index: tools/telemetry/telemetry/core/timeline/event.py
diff --git a/tools/telemetry/telemetry/core/timeline/event.py b/tools/telemetry/telemetry/core/timeline/event.py
index 916d540eabe8d2bdab06a28ef2d762c0ae71e980..561ca0d64be1a44b09e301e6f8e46dde1cefec19 100644
--- a/tools/telemetry/telemetry/core/timeline/event.py
+++ b/tools/telemetry/telemetry/core/timeline/event.py
@@ -22,6 +22,7 @@ class TimelineEvent(object):
     self.thread_duration = thread_duration
     self.args = args
 
+

[chrishenry, 2014/05/13 03:22:38]

2 blank lines intentional?

[nednguyen, 2014/05/14 17:32:27]

Done.

   @property
   def end(self):
     return self.start + self.duration
@@ -36,6 +37,20 @@ class TimelineEvent(object):
       return None
     return self.thread_start + self.thread_duration
 
+  def IsTopMessageLoop(self):

[chrishenry, 2014/05/13 03:22:38]

Document what a top message loop means?

+    return self.name == 'MessageLoop::RunTask'
+
+  def GetOverlappedTimeDurationWithRange(self, start, end):
+    overlapped_interval_start = max(self.start, start)
+    overlapped_interval_end = min(self.end, end)
+    return max(overlapped_interval_end - overlapped_interval_start, 0)
+
+  def GetOverlappedThreadTimeDurationWithRange(self, thread_start, thread_end):
+    overlapped_interval_thread_start = max(self.thread_start, thread_start)

[chrishenry, 2014/05/13 03:22:38]

This doesn't specifically handle None?

[nednguyen, 2014/05/14 17:32:27]

Done.

+    overlapped_interval_thread_end = min(self.thread_end, thread_end)
+    return max(
+      overlapped_interval_thread_end - overlapped_interval_thread_start, 0)

[chrishenry, 2014/05/13 03:22:38]

nit: 4-space align?

[nednguyen, 2014/05/14 17:32:27]

Done.

+
   def __repr__(self):
     if self.args:
       args_str = ', ' + repr(self.args)