[Telemetry] Fix exception handling for blink_styles and rasterize_and_record use of WaitFor

tools/perf/measurements/blink_style.py

Index: tools/perf/measurements/blink_style.py
diff --git a/tools/perf/measurements/blink_style.py b/tools/perf/measurements/blink_style.py
index d20befb3a8b7e11077fd131acc135db698bdf5fc..dae97c74cf8044df1892dda356579e3c9605d728 100644
--- a/tools/perf/measurements/blink_style.py
+++ b/tools/perf/measurements/blink_style.py
@@ -4,12 +4,12 @@
 
 from collections import defaultdict
 from itertools import starmap
-from telemetry.core import exceptions
 from telemetry.core import util
 from telemetry.page import legacy_page_test
 from telemetry.value import scalar
 
 from measurements import timeline_controller
+import py_utils
 
 
 class BlinkStyle(legacy_page_test.LegacyPageTest):
@@ -33,7 +33,7 @@ class BlinkStyle(legacy_page_test.LegacyPageTest):
       tab.ExecuteJavaScript('console.time("");')
       try:
         util.WaitFor(tab.HasReachedQuiescence, 15)
-      except exceptions.TimeoutException:
+      except py_utils.TimeoutException:
         # Some sites never reach quiesence. As this benchmark normalizes/
         # categories results, it shouldn't be necessary to reach the same
         # state on every run.