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

tools/perf/measurements/rasterize_and_record_micro.py

Index: tools/perf/measurements/rasterize_and_record_micro.py
diff --git a/tools/perf/measurements/rasterize_and_record_micro.py b/tools/perf/measurements/rasterize_and_record_micro.py
index d58f8d279d7251e58064127002578380c05dafa2..3fc818d756e29493c4e45d469785628c2d97dac9 100644
--- a/tools/perf/measurements/rasterize_and_record_micro.py
+++ b/tools/perf/measurements/rasterize_and_record_micro.py
@@ -4,10 +4,10 @@
 
 import time
 
-from telemetry.core import exceptions
 from telemetry.page import legacy_page_test
 from telemetry.value import scalar
 
+import py_utils
 
 class RasterizeAndRecordMicro(legacy_page_test.LegacyPageTest):
 
@@ -30,7 +30,7 @@ class RasterizeAndRecordMicro(legacy_page_test.LegacyPageTest):
     del page  # unused
     try:
       tab.WaitForDocumentReadyStateToBeComplete()
-    except exceptions.TimeoutException:
+    except py_utils.TimeoutException:
       pass
     time.sleep(self._start_wait_time)