Flaky multiple times

From: https://build.chromium.org/p/chromium.chromiumos/builders/Linux%20ChromiumOS%20Tests%20%281%29/builds/32358/steps/browser_tests/logs/PPAPINaClPNaClNonSfiTest.Graphics2D_FlushOffscreenUpdate

PPAPINaClPNaClNonSfiTest.Graphics2D_FlushOffscreenUpdate (run #1):
[ RUN      ] PPAPINaClPNaClNonSfiTest.Graphics2D_FlushOffscreenUpdate
[30658:30658:0118/012804.765586:WARNING:chrome_browser_main_chromeos.cc(350)] Running as stub user with profile dir: test-user
[30658:30658:0118/012804.790883:WARNING:audio_manager.cc(321)] Multiple instances of AudioManager detected
[30658:30658:0118/012804.790913:WARNING:audio_manager.cc(278)] Multiple instances of AudioManager detected
Xlib:  extension "RANDR" missing on display ":99".
[30658:30658:0118/012804.943163:WARNING:signin_screen_policy_provider.cc(61)] Denying load of Extension  : ahfgeienlihckogmohjhadlkjgocpleb / Web Store because of 'signin_screen' is only allowed for packaged apps, but this is a hosted app.
[30658:30658:0118/012804.943220:WARNING:signin_screen_policy_provider.cc(61)] Denying load of Extension  : eemcgdkfndhakfknompkggombfjjjeno / Bookmark Manager because of 'signin_screen' is only allowed for packaged apps, but this is a extension.
[30658:30658:0118/012804.943291:WARNING:signin_screen_policy_provider.cc(61)] Denying load of Extension  : mgndgikekgjfcpckkfioiadnlibdjbkf / Chromium because of 'signin_screen' is only allowed for packaged apps, but this is a hosted app.
[30658:30658:0118/012804.943332:WARNING:signin_screen_policy_provider.cc(61)] Denying load of Extension  : mhjfbmdgcfjbbpaeojofohoefgiehjai / Chromium PDF Viewer because of 'signin_screen' is only allowed for packaged apps, but this is a extension.
[30658:30658:0118/012804.943382:WARNING:signin_screen_policy_provider.cc(61)] Denying load of Extension  : nkoccljplnhpfnfiajclkommnmllphnl / crosh_builtin because of 'signin_screen' is only allowed for packaged apps, but this is a extension.
[30658:30724:0118/012804.950645:WARNING:freezer_cgroup_process_manager.cc(61)] Cgroup freezer does not exist or is not writable. Unable to freeze renderer processes.
[30658:30658:0118/012805.078330:WARNING:signin_screen_policy_provider.cc(61)] Denying load of Extension  : ahfgeienlihckogmohjhadlkjgocpleb / Web Store because of 'signin_screen' is only allowed for packaged apps, but this is a hosted app.
[30658:30658:0118/012805.078386:WARNING:signin_screen_policy_provider.cc(61)] Denying load of Extension  : eemcgdkfndhakfknompkggombfjjjeno / Bookmark Manager because of 'signin_screen' is only allowed for packaged apps, but this is a extension.
[30658:30658:0118/012805.078436:WARNING:signin_screen_policy_provider.cc(61)] Denying load of Extension  : mgndgikekgjfcpckkfioiadnlibdjbkf / Chromium because of 'signin_screen' is only allowed for packaged apps, but this is a hosted app.
[30658:30658:0118/012805.078470:WARNING:signin_screen_policy_provider.cc(61)] Denying load of Extension  : mhjfbmdgcfjbbpaeojofohoefgiehjai / Chromium PDF Viewer because of 'signin_screen' is only allowed for packaged apps, but this is a extension.
[30658:30658:0118/012805.078514:WARNING:signin_screen_policy_provider.cc(61)] Denying load of Extension  : nkoccljplnhpfnfiajclkommnmllphnl / crosh_builtin because of 'signin_screen' is only allowed for packaged apps, but this is a extension.
[30658:30810:0118/012805.426796:WARNING:embedded_test_server.cc(219)] Request not handled. Returning 404: /favicon.ico
[30658:30658:0118/012805.908533:INFO:CONSOLE(178)] "FlushOffscreenUpdateForceAsync finished in 0.428 seconds.", source: http://127.0.0.1:52203/test_case.html?mode=nacl_pnacl_nonsfi&testcase=Graphics2D_FlushOffscreenUpdate (178)
[30658:30658:0118/012814.958357:WARNING:tab_manager_delegate_chromeos.cc(89)] Set OOM score error:
BrowserTestBase received signal: Terminated. Backtrace:
#0 0x000002e2b1fe base::debug::StackTrace::StackTrace()
#1 0x000003382026 content::(anonymous namespace)::DumpStackTraceSignalHandler()
#2 0x7ffe2815a0b0 <unknown>
#3 0x7ffe2820b993 __poll
#4 0x7ffe2c2e7ff6 <unknown>
#5 0x7ffe2c2e8124 g_main_context_iteration
#6 0x000002e44b66 base::MessagePumpGlib::Run()
#7 0x000002e42e28 base::MessageLoop::RunHandler()
#8 0x000002e623de base::RunLoop::Run()
#9 0x0000033ad01a content::RunMessageLoop()
#10 0x00000338c3ea content::JavascriptTestObserver::Run()
#11 0x000002ed4106 PPAPITestBase::RunTestURL()
#12 0x000002ed44a7 PPAPITestBase::RunTestViaHTTP()
#13 0x00000121447a PPAPINaClPNaClTest_Graphics2D_FlushOffscreenUpdate_Test::RunTestOnMainThread()
#14 0x000002ecc137 InProcessBrowserTest::RunTestOnMainThreadLoop()
#15 0x000003381da8 content::BrowserTestBase::ProxyRunTestOnMainThreadLoop()
#16 0x000002f0588e ChromeBrowserMainParts::PreMainMessageLoopRunImpl()
#17 0x000002f04a61 ChromeBrowserMainParts::PreMainMessageLoopRun()
#18 0x0000017ba35a chromeos::ChromeBrowserMainPartsChromeos::PreMainMessageLoopRun()
#19 0x000002624cd5 content::BrowserMainLoop::PreMainMessageLoopRun()
#20 0x0000028d7e66 content::StartupTaskRunner::RunAllTasksNow()
#21 0x000002622e6b content::BrowserMainLoop::CreateStartupTasks()
#22 0x000002627d3b content::BrowserMainRunnerImpl::Initialize()
#23 0x000002620558 content::BrowserMain()
#24 0x000002de74cc content::ContentMainRunnerImpl::Run()
#25 0x000002de6140 content::ContentMain()
#26 0x00000338170a content::BrowserTestBase::SetUp()
#27 0x000002eca83e InProcessBrowserTest::SetUp()
#28 0x00000393cdd8 testing::Test::Run()
#29 0x00000393dce0 testing::TestInfo::Run()
#30 0x00000393e177 testing::TestCase::Run()
#31 0x000003945437 testing::internal::UnitTestImpl::RunAllTests()
#32 0x00000394504a testing::UnitTest::Run()
#33 0x000002edcf61 base::TestSuite::Run()
#34 0x000002e2094b ChromeTestSuiteRunner::RunTestSuite()
#35 0x0000033a9eb7 content::LaunchTests()
#36 0x000002e1ef11 main
#37 0x7ffe281457ed __libc_start_main
#38 0x000000637be1 <unknown>