Filed by sheriff-o-matic@appspot.gserviceaccount.com on behalf of fhorschig@google.com

ExtensionApiTabTest.UpdateWindowResize fails network_service_browser_tests (failing on chromium.mac/Mac10.12 Tests)

Builders failed on: 
- Mac10.12 Tests:  https://ci.chromium.org/p/chromium/builders/luci.chromium.ci/Mac10.12%20Tests

The test is failing consistently (8/8) since
https://ci.chromium.org/p/chromium/builders/luci.chromium.ci/Mac10.12%20Tests/17505

Most recent failure:
https://ci.chromium.org/p/chromium/builders/luci.chromium.ci/Mac10.12%20Tests/17513

[ RUN      ] ExtensionApiTabTest.UpdateWindowResize
[30121:4099:1210/185240.834092:WARNING:notification_platform_bridge_mac.mm(521)] AlertNotificationService: XPC connection invalidated.
[30121:775:1210/185241.868437:INFO:CONSOLE(0)] "[FAIL] testCurrentWindowResize: API Test Error in testCurrentWindowResize
Actual: 520
Expected: 500
Error
    at extensions::test:243:18
    at chrome-extension://okmoadclicoiebokfkibjpgcibkikpgg/test.js:67:23
    at safeFunctionApply (extensions::test:288:26)
    at extensions::test:313:18", source: chrome-extension://okmoadclicoiebokfkibjpgcibkikpgg/test.html (0)
[30121:775:1210/185242.083569:INFO:CONSOLE(0)] "[FAIL] testResizeNormal: API Test Error in testResizeNormal
Actual: 520
Expected: 510
Error
    at extensions::test:243:18
    at changeHeight (chrome-extension://okmoadclicoiebokfkibjpgcibkikpgg/test.js:33:15)
    at safeFunctionApply (extensions::test:288:26)
    at extensions::test:313:18", source: chrome-extension://okmoadclicoiebokfkibjpgcibkikpgg/test.html (0)
[30121:775:1210/185242.682317:INFO:CONSOLE(0)] "[SUCCESS] testResizePopup", source: chrome-extension://okmoadclicoiebokfkibjpgcibkikpgg/test.html (0)
[30121:775:1210/185243.118929:INFO:CONSOLE(0)] "[SUCCESS] testResizePanel", source: chrome-extension://okmoadclicoiebokfkibjpgcibkikpgg/test.html (0)
../../chrome/browser/extensions/extension_tabs_apitest.cc:249: Failure
Value of: RunExtensionTest("window_update/resize")
  Actual: false
Expected: true
Failed 2 of 4 tests
Stack trace:
0   browser_tests                       0x00000001081efdbb testing::internal::UnitTestImpl::CurrentOsStackTraceExceptTop(int) + 91
1   browser_tests                       0x00000001081ef779 testing::internal::AssertHelper::operator=(testing::Message const&) const + 89
2   browser_tests                       0x0000000107bc72f2 ExtensionApiTabTest_UpdateWindowResize_Test::RunTestOnMainThread() + 274
3   browser_tests                       0x000000010b715c8b content::BrowserTestBase::ProxyRunTestOnMainThreadLoop() + 491
4   browser_tests                       0x000000010b15cb4f ChromeBrowserMainParts::PreMainMessageLoopRunImpl() + 4319
5   browser_tests                       0x000000010b15b9ad ChromeBrowserMainParts::PreMainMessageLoopRun() + 45
6   browser_tests                       0x000000010928fcd2 content::BrowserMainLoop::PreMainMessageLoopRun() + 50
7   browser_tests                       0x00000001096f3287 content::StartupTaskRunner::RunAllTasksNow() + 39
8   browser_tests                       0x000000010928e87b content::BrowserMainLoop::CreateStartupTasks() + 683
9   browser_tests                       0x0000000109291ed5 content::BrowserMainRunnerImpl::Initialize(content::MainFunctionParams const&) + 85
10  browser_tests                       0x000000010928cce2 content::BrowserMain(content::MainFunctionParams const&) + 178
11  browser_tests                       0x000000010abe5f41 content::ContentMainRunnerImpl::RunServiceManager(content::MainFunctionParams&, bool) + 241
12  browser_tests                       0x000000010abe5e24 content::ContentMainRunnerImpl::Run(bool) + 292
13  browser_tests                       0x000000010df4fedb service_manager::Main(service_manager::MainParams const&) + 3051
14  browser_tests                       0x000000010abe4fd4 content::ContentMain(content::ContentMainParams const&) + 68
15  browser_tests                       0x000000010b7158dd content::BrowserTestBase::SetUp() + 2829
16  browser_tests                       0x000000010b0d0181 InProcessBrowserTest::SetUp() + 529

[30121:28163:1210/185243.410559:ERROR:browser_process_sub_thread.cc(209)] Waited 14 ms for network service
[30121:775:1210/185243.427264:WARNING:pref_notifier_impl.cc(23)] Pref observer found at shutdown.
[30121:775:1210/185243.427290:WARNING:pref_notifier_impl.cc(23)] Pref observer found at shutdown.
[  FAILED  ] ExtensionApiTabTest.UpdateWindowResize, where TypeParam =  and GetParam() =  (2768 ms)