Wire FailureValue in PageTestResults (try 2).

tools/perf/measurements/skpicture_printer_unittest.py

Index: tools/perf/measurements/skpicture_printer_unittest.py
diff --git a/tools/perf/measurements/skpicture_printer_unittest.py b/tools/perf/measurements/skpicture_printer_unittest.py
index e7871db626036d8a1721857fb50798aa483a2def..7c35992bcb282bd18fb4fd93576d1bbb4519d306 100644
--- a/tools/perf/measurements/skpicture_printer_unittest.py
+++ b/tools/perf/measurements/skpicture_printer_unittest.py
@@ -9,6 +9,7 @@ from measurements import skpicture_printer
 from telemetry.page import page_measurement_unittest_base
 from telemetry.unittest import options_for_unittests
 from telemetry.unittest import test
+from telemetry.value import failure
 
 
 class SkpicturePrinterUnitTest(
@@ -28,7 +29,8 @@ class SkpicturePrinterUnitTest(
 
     # Picture printing is not supported on all platforms.
     if results.failures:
-      assert 'not supported' in results.failures[0][1]
+      assert 'not supported' in failure.GetStringFromExcInfo(

[nednguyen, 2014/07/23 16:34:49]

A better alternative could be str(results.failures[0]) that return
_GetStringFromExcInfo(..) or I think results.failures[0][1].message would be
enough.

[chrishenry, 2014/07/23 17:48:24]

Done. results.failures[0].exc_info[1].message is the one you want.

+          results.failures[0].exc_info)
       return
 
     saved_picture_count = results.FindAllPageSpecificValuesNamed(