Telemetry: smoothness measurement throws MissingTimelineMarker.

tools/perf/measurements/smoothness.py

Index: tools/perf/measurements/smoothness.py
diff --git a/tools/perf/measurements/smoothness.py b/tools/perf/measurements/smoothness.py
index 47a7802b7af51579fa5a3a4b95b17da47f804739..b257e78ac229f1fb4f19754106bd5a2ecee76402 100644
--- a/tools/perf/measurements/smoothness.py
+++ b/tools/perf/measurements/smoothness.py
@@ -15,6 +15,10 @@ class MissingDisplayFrameRate(page_measurement.MeasurementFailure):
     super(MissingDisplayFrameRate, self).__init__(
         'Missing display frame rate metrics: ' + name)
 

[bulach, 2013/09/05 10:30:33]

ultra nit: not your fault, but there should be two \n between "top-levels", so
an extra one in line 8, then 12, then here, then after this class..

+class MissingTimelineMarker(page_measurement.MeasurementFailure):
+  def __init__(self):
+    super(MissingTimelineMarker, self).__init__('Timeline marker not found')
+
 class Smoothness(page_measurement.PageMeasurement):
   def __init__(self):
     super(Smoothness, self).__init__('smoothness')
@@ -57,7 +61,7 @@ class Smoothness(page_measurement.PageMeasurement):
                   smoothness.TIMELINE_MARKER)
               if s.parent_slice == None]
     if len(events) != 1:
-      raise LookupError, 'timeline marker not found'
+      raise MissingTimelineMarker()
     return events[0]
 
   def MeasurePage(self, page, tab, results):