Add responsiveness_metric for timeline_based_measurement

tools/telemetry/telemetry/core/timeline/thread.py

Index: tools/telemetry/telemetry/core/timeline/thread.py
diff --git a/tools/telemetry/telemetry/core/timeline/thread.py b/tools/telemetry/telemetry/core/timeline/thread.py
index 3b76397ed8bd97fee1619f70cb2c51d8d89c7b74..aebe7050a0ff285195d1976dd5047f1a1aa956c0 100644
--- a/tools/telemetry/telemetry/core/timeline/thread.py
+++ b/tools/telemetry/telemetry/core/timeline/thread.py
@@ -54,11 +54,23 @@ class Thread(event_container.TimelineEventContainer):
       for sub_slice in s.IterEventsInThisContainerRecrusively():
         yield sub_slice
 
-  def IterAllSlicesInRange(self, start, end):
+  def IterAllSlicesInTimeRange(self, start, end):
+    """ Returns all slices whose time ranges are in the
+        range (start, end).

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

"Returns all slices with time ranges within start and end, inclusive."

(Btw, do we follow google python style guide here or something else? If so, this
should be just 1 line, with additional information in the next paragraph.)

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

Done. This weird newline is because I used a splitted screen in my terminal.

+    """
     for s in self.IterAllSlices():
       if s.start >= start and s.end <= end:
         yield s
 
+  def IterAllSlicesOverlappedWithThreadTimeRange(self, thread_start,
+                                                 thread_end):
+    """ Returns all slices whose thread time ranges overlap with the range
+        (start, end).

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

thread_start, thread_end

+    """
+    for s in self.IterAllSlices():
+      if s.thread_end > thread_start and s.thread_start < thread_end:

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

Slice objects are TimelineEvent (right?), so you will need to handle None here.

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

Done.

+        yield s
+
   def IterAllSlicesOfName(self, name):
     for s in self.IterAllSlices():
       if s.name == name: