11-22 15:52:26.996  7357  7357 F chromium: [7357:7357:1122/155226.987942:FATAL:thread_task_runner_handle.cc(29)] Check failed: current. Error: This caller requires a single-threaded context (i.e. the current task needs to run from a SingleThreadTaskRunner).

  00460d31  base::debug::BreakDebugger()+20                                                                                                                                                                                /data/app-lib/org.chromium.content_shell_apk-1/libcontent_shell_content_view.so
  0046f00d  logging::LogMessage::~LogMessage()+796                                                                                                                                                                         /data/app-lib/org.chromium.content_shell_apk-1/libcontent_shell_content_view.so
  004a1ddb  base::ThreadTaskRunnerHandle::Get()+106                                                                                                                                                                        /data/app-lib/org.chromium.content_shell_apk-1/libcontent_shell_content_view.so
  00483c93  base::RunLoop::RunLoop(base::RunLoop::Type)+86                                                                                                                                                                 /data/app-lib/org.chromium.content_shell_apk-1/libcontent_shell_content_view.so
  013c98e3  LayoutTestBrowserMain(content::MainFunctionParams const&, std::__ndk1::unique_ptr<content::BrowserMainRunner, std::__ndk1::default_delete<content::BrowserMainRunner> > const&)+758                            /data/app-lib/org.chromium.content_shell_apk-1/libcontent_shell_content_view.so
  013ba473  content::ShellMainDelegate::RunProcess(std::__ndk1::basic_string<char, std::__ndk1::char_traits<char>, std::__ndk1::allocator<char> > const&, content::MainFunctionParams const&)+134                          /data/app-lib/org.chromium.content_shell_apk-1/libcontent_shell_content_view.so
  013275b5  content::RunNamedProcessTypeMain(std::__ndk1::basic_string<char, std::__ndk1::char_traits<char>, std::__ndk1::allocator<char> > const&, content::MainFunctionParams const&, content::ContentMainDelegate*)+96  /data/app-lib/org.chromium.content_shell_apk-1/libcontent_shell_content_view.so
  01327a2f  content::ContentMainRunnerImpl::Run()+198                                                                                                                                                                      /data/app-lib/org.chromium.content_shell_apk-1/libcontent_shell_content_view.so
  00adedf9  service_manager::Main(service_manager::MainParams const&)+564                                                                                                                                                  /data/app-lib/org.chromium.content_shell_apk-1/libcontent_shell_content_view.so
  00d97b33  Java_org_chromium_content_app_ContentMain_nativeStart+98                                                                                                                                                       /data/app-lib/org.chromium.content_shell_apk-1/libcontent_shell_content_view.so
  0001dbcc  dvmPlatformInvoke+112                                                                                                                                                                                          /system/lib/libdvm.so
  0004e123  dvmCallJNIMethod(unsigned int const*, JValue*, Method const*, Thread*)+398                                                                                                                                     /system/lib/libdvm.so
  00026fe0  <unknown>                                                                                                                                                                                                      /system/lib/libdvm.so
  0002dfa0  dvmMterpStd(Thread*)+76                                                                                                                                                                                        /system/lib/libdvm.so
  0002b638  dvmInterpret(Thread*, Method const*, JValue*)+184                                                                                                                                                              /system/lib/libdvm.so
  00060865  dvmInvokeMethod(Object*, Method const*, ArrayObject*, ArrayObject*, ClassObject*, bool)+392                                                                                                                    /system/lib/libdvm.so
  000687c7  <unknown>                                                                                                                                                                                                      /system/lib/libdvm.so
  00026fe0  <unknown>                                                                                                                                                                                                      /system/lib/libdvm.so
  0002dfa0  dvmMterpStd(Thread*)+76                                                                                                                                                                                        /system/lib/libdvm.so
  0002b638  dvmInterpret(Thread*, Method const*, JValue*)+184                                                                                                                                                              /system/lib/libdvm.so
  00060581  dvmCallMethodV(Thread*, Method const*, Object*, bool, JValue*, std::__va_list)+336                                                                                                                             /system/lib/libdvm.so
  00049d0b  <unknown>                                                                                                                                                                                                      /system/lib/libdvm.so
  0004cde7  <unknown>                                                                                                                                                                                                      /system/lib/libandroid_runtime.so
  0004db0b  android::AndroidRuntime::start(char const*, char const*)+354                                                                                                                                                   /system/lib/libandroid_runtime.so
  0000105b  <unknown>                                                                                                                                                                                                      /system/bin/app_process
  0000e34b  __libc_init+50                                                                                                                                                                                                 /system/lib/libc.so
  00000d7c  <unknown>                                                                                                                                                                                                      /system/bin/app_process
Stack Data:

Tons of other crashes and that one looks like thread startup failed.
+trooper, maybe device needs to be taken out of pool or replaced?

Per #1, assigning to trooper to look at and removing from Sheriff queue.

Flakiness dashboard:

https://test-results.appspot.com/dashboards/flakiness_dashboard.html#testType=webkit_tests&tests=fast%2Fleaks%2F001.html

This shows only a single failure (crash) so I don't think this is flake. If the trooper finds this isn't an issue, just WontFix this please (instead of putting it back in the sheriff queue).

There are many successful runs in a row on this builder. Marking as WontFix for now. We can reopen this bug if necessary.