[Telemetry] Copy perf_result_data_type.py & perf_tests_results_helper.py to telemetry/util

tools/telemetry/telemetry/web_perf/metrics/smoothness.py

Index: tools/telemetry/telemetry/web_perf/metrics/smoothness.py
diff --git a/tools/telemetry/telemetry/web_perf/metrics/smoothness.py b/tools/telemetry/telemetry/web_perf/metrics/smoothness.py
index 42445ab6ca9e97b4ba14d4bcad011ff17708c697..2bc7e55d1a5f28655a672950b6c92f5bac39ba08 100644
--- a/tools/telemetry/telemetry/web_perf/metrics/smoothness.py
+++ b/tools/telemetry/telemetry/web_perf/metrics/smoothness.py
@@ -3,7 +3,8 @@
 # found in the LICENSE file.
 
 import logging
-from telemetry.perf_tests_helper import FlattenList
+
+from telemetry.util import perf_tests_helper
 from telemetry.util import statistics
 from telemetry.value import list_of_scalar_values
 from telemetry.value import scalar
@@ -164,7 +165,7 @@ class SmoothnessMetric(timeline_based_metric.TimelineBasedMetric):
     latency_discrepancy = None
     none_value_reason = None
     if self._HasEnoughFrames(stats.frame_timestamps):
-      latency_list = FlattenList(list_of_latency_lists)
+      latency_list = perf_tests_helper.FlattenList(list_of_latency_lists)
       if len(latency_list) == 0:
         return ()
       mean_latency = round(statistics.ArithmeticMean(latency_list), 3)
@@ -188,7 +189,8 @@ class SmoothnessMetric(timeline_based_metric.TimelineBasedMetric):
     first_gesture_scroll_update_latency = None
     none_value_reason = None
     if self._HasEnoughFrames(stats.frame_timestamps):
-      latency_list = FlattenList(stats.gesture_scroll_update_latency)
+      latency_list = perf_tests_helper.FlattenList(
+          stats.gesture_scroll_update_latency)
       if len(latency_list) == 0:
         return ()
       first_gesture_scroll_update_latency = round(latency_list[0], 4)
@@ -212,7 +214,8 @@ class SmoothnessMetric(timeline_based_metric.TimelineBasedMetric):
     if 'frame_queueing_durations' in stats.errors:
       none_value_reason = stats.errors['frame_queueing_durations']
     elif self._HasEnoughFrames(stats.frame_timestamps):
-      queueing_durations = FlattenList(stats.frame_queueing_durations)
+      queueing_durations = perf_tests_helper.FlattenList(
+          stats.frame_queueing_durations)
       if len(queueing_durations) == 0:
         queueing_durations = None
         none_value_reason = 'No frame queueing durations recorded.'
@@ -239,7 +242,7 @@ class SmoothnessMetric(timeline_based_metric.TimelineBasedMetric):
     percentage_smooth = None
     none_value_reason = None
     if self._HasEnoughFrames(stats.frame_timestamps):
-      frame_times = FlattenList(stats.frame_times)
+      frame_times = perf_tests_helper.FlattenList(stats.frame_times)
       mean_frame_time = round(statistics.ArithmeticMean(frame_times), 3)
       # We use 17ms as a somewhat looser threshold, instead of 1000.0/60.0.
       smooth_threshold = 17.0
@@ -294,7 +297,8 @@ class SmoothnessMetric(timeline_based_metric.TimelineBasedMetric):
     none_value_reason = None
     if self._HasEnoughFrames(stats.frame_timestamps):
       mean_pixels_approximated = round(statistics.ArithmeticMean(
-          FlattenList(stats.approximated_pixel_percentages)), 3)
+          perf_tests_helper.FlattenList(
+              stats.approximated_pixel_percentages)), 3)
     else:
       none_value_reason = NOT_ENOUGH_FRAMES_MESSAGE
     return scalar.ScalarValue(
@@ -318,7 +322,8 @@ class SmoothnessMetric(timeline_based_metric.TimelineBasedMetric):
             rendering_stats.CHECKERBOARDED_PIXEL_ERROR]
       else:
         mean_pixels_checkerboarded = round(statistics.ArithmeticMean(
-            FlattenList(stats.checkerboarded_pixel_percentages)), 3)
+            perf_tests_helper.FlattenList(
+                stats.checkerboarded_pixel_percentages)), 3)
     else:
       none_value_reason = NOT_ENOUGH_FRAMES_MESSAGE
     return scalar.ScalarValue(