Revision range first seen: 403950:403961
Link to failing step log: https://uberchromegw.corp.google.com/i/chromium.perf/builders/Mac%2010.11%20Perf%20%284%29/builds/3478/steps/blink_perf.canvas/logs/stdio

Suspect junov's change in that range:
Fix canvas blink_perf tests to avoid GPU fallback
https://codereview.chromium.org/2126013002

junov@ PTAL ASAP

Test output:
FATAL: test fails due to GPU issue. ReferenceError: destCanvas2D is not defined
Traceback (most recent call last):
  File "/b/build/slave/Mac_10_11_Perf__4_/build/src/third_party/catapult/telemetry/telemetry/internal/story_runner.py", line 85, in _RunStoryAndProcessErrorIfNeeded
    state.RunStory(results)
  File "/b/build/slave/Mac_10_11_Perf__4_/build/src/third_party/catapult/telemetry/telemetry/page/shared_page_state.py", line 321, in RunStory
    self._current_page, self._current_tab, results)
  File "/b/build/slave/Mac_10_11_Perf__4_/build/src/tools/perf/benchmarks/blink_perf.py", line 115, in ValidateAndMeasurePage
    results.current_page, metric, units, values))
  File "/b/build/slave/Mac_10_11_Perf__4_/build/src/third_party/catapult/telemetry/telemetry/value/list_of_scalar_values.py", line 84, in __init__
    assert len(values) > 0
AssertionError

[  FAILED  ] draw-dynamic-webgl-to-hw-accelerated-canvas-2d.html (491 ms)
(INFO) 2016-07-06 15:56:42,127 exception_formatter.PrintFormattedException:19  Try printing formatted exception: None None None

Traceback (most recent call last):
  RunBenchmark at /b/build/slave/Mac_10_11_Perf__4_/build/src/third_party/catapult/telemetry/telemetry/internal/story_runner.py:317
    benchmark.ShouldTearDownStateAfterEachStorySetRun())
  Run at /b/build/slave/Mac_10_11_Perf__4_/build/src/third_party/catapult/telemetry/telemetry/internal/story_runner.py:226
    _RunStoryAndProcessErrorIfNeeded(story, results, state, test)
  _RunStoryAndProcessErrorIfNeeded at /b/build/slave/Mac_10_11_Perf__4_/build/src/third_party/catapult/telemetry/telemetry/internal/story_runner.py:85
    state.RunStory(results)
  RunStory at /b/build/slave/Mac_10_11_Perf__4_/build/src/third_party/catapult/telemetry/telemetry/page/shared_page_state.py:321
    self._current_page, self._current_tab, results)
  ValidateAndMeasurePage at /b/build/slave/Mac_10_11_Perf__4_/build/src/tools/perf/benchmarks/blink_perf.py:115
    results.current_page, metric, units, values))
  __init__ at /b/build/slave/Mac_10_11_Perf__4_/build/src/third_party/catapult/telemetry/telemetry/value/list_of_scalar_values.py:84
    assert len(values) > 0
AssertionError