Disabling this test, since it has failed in the last five runs consistently and been failing intermittently since at least (and maybe longer):
https://build.chromium.org/p/chromium.linux/builders/Linux%20Tests/builds/53989

Disabling since I didn't see anything obvious in that build to associate with the error. I would have assigned this to Raymes, but got an OOO message, so wondering if Tommy can take a quick look and/or reassign to Raymes once back.

The error is:

FlashPermissionBrowserTest.BlockFileURL (run #1):
[ RUN      ] FlashPermissionBrowserTest.BlockFileURL
Xlib:  extension "RANDR" missing on display ":99".
[27037:27037:0330/030517.478316:WARNING:audio_manager.cc(295)] Multiple instances of AudioManager detected
[27037:27037:0330/030517.478362:WARNING:audio_manager.cc(254)] Multiple instances of AudioManager detected
[27037:27037:0330/030517.525999:WARNING:password_store_factory.cc(247)] Using basic (unencrypted) store for password storage. See https://chromium.googlesource.com/chromium/src/+/master/docs/linux_password_storage.md for more information about password storage options.
[27037:27235:0330/030517.783624:WARNING:embedded_test_server.cc(219)] Request not handled. Returning 404: /favicon.ico
[27037:27037:0330/030517.904193:INFO:CONSOLE(1)] "Uncaught ReferenceError: flashIsEnabledForPluginWithoutFallback is not defined", source:  (1)
BrowserTestBase received signal: Terminated. Backtrace:
#0 0x0000029132b7 base::debug::StackTrace::StackTrace()
#1 0x000002e96a66 content::(anonymous namespace)::DumpStackTraceSignalHandler()
#2 0x7efc6b771cb0 <unknown>
#3 0x7efc6b827fdd __poll
#4 0x7efc71299fe4 <unknown>
#5 0x7efc7129a0ec g_main_context_iteration
#6 0x00000292c7c6 base::MessagePumpGlib::Run()
#7 0x00000292a917 base::MessageLoop::RunHandler()
#8 0x000002949fde base::RunLoop::Run()
#9 0x000002ebda21 content::MessageLoopRunner::Run()
#10 0x0000029b2c82 content::DOMMessageQueue::WaitForMessage()
#11 0x0000029b1c67 content::(anonymous namespace)::ExecuteScriptHelper()
#12 0x0000029b1f69 content::ExecuteScriptAndExtractBool()
#13 0x000000d1ed92 PermissionsBrowserTest::RunScriptReturnBool()
#14 0x000000d24063 FlashPermissionBrowserTest::FeatureUsageSucceeds()
#15 0x000000d1f7d3 PermissionsBrowserTest::CommonFailsIfBlocked()
#16 0x000000d22f12 FlashPermissionBrowserTest_BlockFileURL_Test::RunTestOnMainThread()
#17 0x0000029c0ecf InProcessBrowserTest::RunTestOnMainThreadLoop()
#18 0x000002e967c8 content::BrowserTestBase::ProxyRunTestOnMainThreadLoop()
#19 0x000002d017e2 ChromeBrowserMainParts::PreMainMessageLoopRunImpl()
#20 0x000002d00891 ChromeBrowserMainParts::PreMainMessageLoopRun()
#21 0x00000197aaf5 content::BrowserMainLoop::PreMainMessageLoopRun()
#22 0x000001c51c07 content::StartupTaskRunner::RunAllTasksNow()
#23 0x000001978cdb content::BrowserMainLoop::CreateStartupTasks()
#24 0x00000197ddbc content::BrowserMainRunnerImpl::Initialize()
#25 0x0000019763c8 content::BrowserMain()
#26 0x0000028fcd1c content::ContentMainRunnerImpl::Run()
#27 0x000003d98c65 service_manager::Main()
#28 0x0000028fbd62 content::ContentMain()
#29 0x000002e96109 content::BrowserTestBase::SetUp()
#30 0x0000029bf5c0 InProcessBrowserTest::SetUp()
#31 0x00000347399e testing::Test::Run()
#32 0x000003474560 testing::TestInfo::Run()
#33 0x0000034748d7 testing::TestCase::Run()
#34 0x00000347baf7 testing::internal::UnitTestImpl::RunAllTests()
#35 0x00000347b777 testing::UnitTest::Run()
#36 0x0000029d06e1 base::TestSuite::Run()raymes@chromium.org
#37 0x0000029075c8 ChromeTestSuiteRunner::RunTestSuite()
#38 0x000002eba04a content::LaunchTests()
#39 0x000002907547 main
#40 0x7efc6b75cf45 __libc_start_main
#41 0x00000060052d <unknown>