Filed by sheriff-o-matic@appspot.gserviceaccount.com on behalf of charliea@chromium.org

blink_perf benchmarks failing due to histogram pipeline rollout

Builders failed on: 
- Android Nexus5 Perf: 
  https://build.chromium.org/p/chromium.perf/builders/Android%20Nexus5%20Perf
- Android Nexus5X Perf: 
  https://build.chromium.org/p/chromium.perf/builders/Android%20Nexus5X%20Perf
- Android Nexus5X WebView Perf: 
  https://build.chromium.org/p/chromium.perf/builders/Android%20Nexus5X%20WebView%20Perf
- Android Nexus7v2 Perf: 
  https://build.chromium.org/p/chromium.perf/builders/Android%20Nexus7v2%20Perf
- Android One Perf: 
  https://build.chromium.org/p/chromium.perf/builders/Android%20One%20Perf

Failure log looks like:

Traceback (most recent call last):
  File "../../testing/scripts/run_telemetry_benchmark_as_googletest.py", line 131, in run_benchmark
    perf_results = json.load(f)
  File "/b/swarming/w/ir/.swarming_module/lib/python2.7/json/__init__.py", line 291, in load
    **kw)
  File "/b/swarming/w/ir/.swarming_module/lib/python2.7/json/__init__.py", line 339, in loads
    return _default_decoder.decode(s)
  File "/b/swarming/w/ir/.swarming_module/lib/python2.7/json/decoder.py", line 364, in decode
    obj, end = self.raw_decode(s, idx=_w(s, 0).end())
  File "/b/swarming/w/ir/.swarming_module/lib/python2.7/json/decoder.py", line 382, in raw_decode
    raise ValueError("No JSON object could be decoded")