Add responsiveness_metric for timeline_based_measurement

tools/telemetry/telemetry/core/timeline/thread_unittest.py

Index: tools/telemetry/telemetry/core/timeline/thread_unittest.py
diff --git a/tools/telemetry/telemetry/core/timeline/thread_unittest.py b/tools/telemetry/telemetry/core/timeline/thread_unittest.py
index 4b5818ea4d71d76b1e4792a371df438c369e34b8..971d59917164a8061803f7d97f09d892595d48bb 100644
--- a/tools/telemetry/telemetry/core/timeline/thread_unittest.py
+++ b/tools/telemetry/telemetry/core/timeline/thread_unittest.py
@@ -7,7 +7,7 @@ from telemetry.core.timeline import model as model_module
 
 class ThreadUnittest(unittest.TestCase):
 
-  def testIterAllSlicesInRange(self):
+  def testIterAllSlicesInTimeRange(self):
     model = model_module.TimelineModel()
     renderer_main = model.GetOrCreateProcess(1).GetOrCreateThread(2)
     #    [       X     ] [   Y    ] [   U   ]
@@ -27,5 +27,38 @@ class ThreadUnittest(unittest.TestCase):
 
     model.FinalizeImport(shift_world_to_zero=False)
     slice_names = set(s.name for s in
-                      renderer_main.IterAllSlicesInRange(start=12, end=65))
+                      renderer_main.IterAllSlicesInTimeRange(start=12, end=65))
     self.assertEqual(slice_names, {'Z', 'Y', 'T'})
+
+  def testIterAllSlicesOverlappedWithTimeRange(self):
+    model = model_module.TimelineModel()
+    renderer_main = model.GetOrCreateProcess(1).GetOrCreateThread(2)
+    #       [      X     ] [   Y    ] [   U   ]
+    #  [ Z ]     [ T ]
+    #         |                    |
+    #       start                 end
+
+    # Z starts at 5 and ends at 12
+    renderer_main.BeginSlice('cat1', 'Z', 5)
+    renderer_main.EndSlice(12)
+
+    # X starts at 15 and ends at 25
+    # T starts at 17 and ends at 20
+    renderer_main.BeginSlice('cat1', 'X', 15)
+    renderer_main.BeginSlice('cat1', 'T', 17)
+    renderer_main.EndSlice(20)
+    renderer_main.EndSlice(25)
+
+    # Y starts at 30 and ends at 45
+    renderer_main.BeginSlice('cat1', 'Y', 30)
+    renderer_main.EndSlice(45)
+
+    # U starts at 55 and ends at 65
+    renderer_main.BeginSlice('cat1', 'U', 55)
+    renderer_main.EndSlice(65)
+
+    model.FinalizeImport(shift_world_to_zero=False)
+    slice_names = set(
+      s.name for s in
+      renderer_main.IterAllSlicesOverlappedWithTimeRange(16, 35))
+    self.assertEqual(slice_names, {'X', 'Y', 'T'})