HasReachedQuiescence can be flaky. IMO, the best fix is to manually update the wait condition of these pages to wait for some specific dom element.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/915214c2cce83f264385e0db77d3d4468aed1301

commit 915214c2cce83f264385e0db77d3d4468aed1301
Author: Kuo-Hsin Yang <vovoy@chromium.org>
Date: Wed Aug 22 15:45:03 2018

Disable flaky loading pages on ChromeOS

NOTRY=true

Bug: chromium:876636
Change-Id: I516f4f2920b7fa99c1cab1b0ab4dcef0053f0564
Reviewed-on: https://chromium-review.googlesource.com/1184740
Commit-Queue: Juan Antonio Navarro Pérez <perezju@chromium.org>
Reviewed-by: Juan Antonio Navarro Pérez <perezju@chromium.org>
Cr-Commit-Position: refs/heads/master@{#585026}
[modify] https://crrev.com/915214c2cce83f264385e0db77d3d4468aed1301/tools/perf/expectations.config

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/0da7dce9a83cbad841f925002a4ddfee8f2afcf7

commit 0da7dce9a83cbad841f925002a4ddfee8f2afcf7
Author: Ned Nguyen <nednguyen@google.com>
Date: Thu Sep 06 00:58:52 2018

Disable flaky loading tests on win 10 perf config

NOTRY=true
TBR=kouhei@chromium.org, ksakamoto@chromium.org

Bug: 876636, 879833
Change-Id: I6d2963cbc6ca33da5e62e68a17d19330786f864a
Reviewed-on: https://chromium-review.googlesource.com/1208960
Reviewed-by: Ned Nguyen <nednguyen@google.com>
Commit-Queue: Ned Nguyen <nednguyen@google.com>
Cr-Commit-Position: refs/heads/master@{#589076}
[modify] https://crrev.com/0da7dce9a83cbad841f925002a4ddfee8f2afcf7/tools/perf/expectations.config

AllRecipes_cold is also flaky on ChromeOS

Error log:

(ERROR) 2018-09-11 18:35:21,391 page_test_results.Fail:540  Failure recorded: Exception raised running AllRecipes_cold
(INFO) 2018-09-11 18:35:21,399 chrome_tracing_agent.RecordClockSyncMarker:180  Chrome version: 3544
(INFO) 2018-09-11 18:35:21,404 chrome_tracing_agent._RemoveTraceConfigFile:294  Remove trace config file in /tmp/chrome-trace-config.json
(INFO) 2018-09-11 18:36:21,496 exception_formatter.PrintFormattedException:19  Try printing formatted exception: None None None

Exception raised when cleaning story run: 

Traceback (most recent call last):
  _RunStoryAndProcessErrorIfNeeded at /home/chromeos-test/images/veyron_jaq-release/R71-11057.0.0/telemetry_src/src/third_party/catapult/telemetry/telemetry/internal/story_runner.py:153
    test.DidRunStory(state.platform, results)
  DidRunStory at /home/chromeos-test/images/veyron_jaq-release/R71-11057.0.0/telemetry_src/src/third_party/catapult/telemetry/telemetry/web_perf/timeline_based_measurement.py:288
    trace_result, _ = platform.tracing_controller.StopTracing()
  StopTracing at /home/chromeos-test/images/veyron_jaq-release/R71-11057.0.0/telemetry_src/src/third_party/catapult/telemetry/telemetry/core/tracing_controller.py:53
    return self._tracing_controller_backend.StopTracing()
  StopTracing at /home/chromeos-test/images/veyron_jaq-release/R71-11057.0.0/telemetry_src/src/third_party/catapult/telemetry/telemetry/internal/platform/tracing_controller_backend.py:157
    '\n'.join(raised_exception_messages))
TracingException: Exceptions raised when trying to stop tracing:
Traceback (most recent call last):
  File "/home/chromeos-test/images/veyron_jaq-release/R71-11057.0.0/telemetry_src/src/third_party/catapult/telemetry/telemetry/internal/platform/tracing_controller_backend.py", line 145, in StopTracing
    agent.CollectAgentTraceData(builder)
  File "/home/chromeos-test/images/veyron_jaq-release/R71-11057.0.0/telemetry_src/src/third_party/catapult/telemetry/telemetry/internal/platform/tracing_agent/chrome_tracing_agent.py", line 248, in CollectAgentTraceData
    '\n'.join(raised_exception_messages))
ChromeTracingStoppedError: Exceptions raised when trying to collect Chrome devtool tracing:
Error when collecting Chrome tracing on devtools at port 37607:
Traceback (most recent call last):
  File "/home/chromeos-test/images/veyron_jaq-release/R71-11057.0.0/telemetry_src/src/third_party/catapult/telemetry/telemetry/internal/platform/tracing_agent/chrome_tracing_agent.py", line 237, in CollectAgentTraceData
    client.CollectChromeTracingData(trace_data_builder)
  File "/home/chromeos-test/images/veyron_jaq-release/R71-11057.0.0/telemetry_src/src/third_party/catapult/telemetry/telemetry/internal/backends/chrome_inspector/devtools_client_backend.py", line 489, in CollectChromeTracingData
    self._tracing_backend.CollectTraceData(trace_data_builder, timeout)
  File "/home/chromeos-test/images/veyron_jaq-release/R71-11057.0.0/telemetry_src/src/third_party/catapult/telemetry/telemetry/internal/backends/chrome_inspector/tracing_backend.py", line 237, in CollectTraceData
    self._CollectTracingData(trace_data_builder, timeout)
  File "/home/chromeos-test/images/veyron_jaq-release/R71-11057.0.0/telemetry_src/src/third_party/catapult/telemetry/telemetry/internal/backends/chrome_inspector/tracing_backend.py", line 279, in _CollectTracingData
    'the timeout amount.' % elapsed_time)
TracingTimeoutException: Only received partial trace data due to timeout after 60.0071730614 seconds. If the trace data is big, you may want to increase the timeout amount.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/2de8f4f0f966637c76152b54aee275dcc49fbbb9

commit 2de8f4f0f966637c76152b54aee275dcc49fbbb9
Author: Kuo-Hsin Yang <vovoy@chromium.org>
Date: Wed Sep 12 11:56:10 2018

Disable loading.desktop/AllRecipes_cold on ChromeOS

Bug: chromium:876636
Change-Id: Iad48e0c8256d612ec971add32adceed39bffd1b5
Reviewed-on: https://chromium-review.googlesource.com/1220931
Commit-Queue: Ned Nguyen <nednguyen@google.com>
Reviewed-by: Ned Nguyen <nednguyen@google.com>
Cr-Commit-Position: refs/heads/master@{#590648}
[modify] https://crrev.com/2de8f4f0f966637c76152b54aee275dcc49fbbb9/tools/perf/expectations.config

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/49bd0e64188e49be0c9061f75b75190accc72a05

commit 49bd0e64188e49be0c9061f75b75190accc72a05
Author: Ned Nguyen <nednguyen@google.com>
Date: Mon Sep 24 13:30:48 2018

Disable loading.desktop/TheOnion_warm on win 7

This is flaky on 'Win 7 Nvidia GPU Perf'

Bug:876636
Change-Id: Ide6e0ceff3b7963f86b7160345a3239542d476c1

TBR=kouhei@chromium.org, ksakamoto@chromium.org

No-Try: true
Change-Id: Ide6e0ceff3b7963f86b7160345a3239542d476c1
Reviewed-on: https://chromium-review.googlesource.com/1240316
Reviewed-by: Ned Nguyen <nednguyen@google.com>
Commit-Queue: Ned Nguyen <nednguyen@google.com>
Cr-Commit-Position: refs/heads/master@{#593521}
[modify] https://crrev.com/49bd0e64188e49be0c9061f75b75190accc72a05/tools/perf/expectations.config