This is the error:

[ RUN      ] ExtensionWebstorePrivateApiTest.IconUrl
Xlib:  extension "RANDR" missing on display ":99".
[18349:18380:0326/194755.595935:ERROR:bus.cc(394)] Failed to connect to the bus: Could not parse server address: Unknown address type (examples of valid types are "tcp" and on UNIX "unix")
[18349:18349:0326/194755.617027:WARNING:password_store_factory.cc(240)] 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.
(browser_tests:18349): LIBDBUSMENU-GLIB-WARNING **: Unable to get session bus: Unknown or unsupported transport 'disabled' for address 'disabled:'
[18349:18349:0326/194756.945932:INFO:CONSOLE(41)] "Synchronous XMLHttpRequest on the main thread is deprecated because of its detrimental effects to the end user's experience. For more help, check https://xhr.spec.whatwg.org/.", source: http://www.example.com:52849/extensions/api_test/webstore_private/common.js (41)
[18349:18406:0326/194757.434373:WARNING:embedded_test_server.cc(228)] Request not handled. Returning 404: /extensions/api_test/webstore_private/does_not_exist.png
[18349:18349:0326/194757.861716:INFO:CONSOLE(0)] "[SUCCESS] IconUrlFailure", source: http://www.example.com:52849/extensions/api_test/webstore_private/icon_url.html (0)
[18349:18406:0326/194757.884358:WARNING:embedded_test_server.cc(228)] Request not handled. Returning 404: /favicon.ico
LaunchProcess: failed to execvp:
xdg-desktop-menu
[18349:18349:0326/194758.952265:INFO:CONSOLE(0)] "[SUCCESS] IconUrlSuccess", source: http://www.example.com:52849/extensions/api_test/webstore_private/icon_url.html (0)
LaunchProcess: failed to execvp:
xdg-desktop-menu
[18349:18349:0326/194759.724008:INFO:CONSOLE(0)] "[SUCCESS] IconUrlSuccessAbsoluteUrl", source: http://www.example.com:52849/extensions/api_test/webstore_private/icon_url.html (0)
==18349==WARNING: MemorySanitizer: use-of-uninitialized-value
    #0 0x11e7c7a2 in DoIsStringASCII<char> ./../../base/strings/string_util.cc:476:46
    #1 0x11e7c7a2 in base::IsStringASCII(base::BasicStringPiece<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > >) ./../../base/strings/string_util.cc:501:0
    #2 0x11e98909 in base::UTF8ToUTF16(base::BasicStringPiece<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > >) ./../../base/strings/utf_string_conversions.cc:160:7
    #3 0x1f71eac6 in ExtensionInstalledBubbleView::GetWindowTitle() const ./../../chrome/browser/ui/views/extensions/extension_installed_bubble_view.cc:219:7
    #4 0x1f71ebf1 in non-virtual thunk to ExtensionInstalledBubbleView::GetWindowTitle() const ./../../chrome/browser/ui/views/extensions/extension_installed_bubble_view.cc:0:0
    #5 0x1586f293 in views::WidgetDelegate::GetAccessibleWindowTitle() const ./../../ui/views/widget/widget_delegate.cc:83:10
    #6 0x158440bd in views::internal::RootView::GetAccessibleNodeData(ui::AXNodeData*) ./../../ui/views/widget/root_view.cc:599:50
    #7 0x15655056 in views::ViewAccessibility::GetAccessibleNodeData(ui::AXNodeData*) const ./../../ui/views/accessibility/view_accessibility.cc:61:16
    #8 0x1210bfb8 in DoesViewHaveAccessibilityErrors ./../../chrome/test/views/accessibility_checker.cc:70:11
    #9 0x1210bfb8 in (anonymous namespace)::DoesViewHaveAccessibilityErrorsRecursive(views::View*, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >*) ./../../chrome/test/views/accessibility_checker.cc:96:0
    #10 0x1210b898 in AddFailureOnWidgetAccessibilityError(views::Widget*) ./../../chrome/test/views/accessibility_checker.cc:113:7
    #11 0x1585fa8f in views::Widget::OnNativeWidgetVisibilityChanged(bool) ./../../ui/views/widget/widget.cc:1068:14
    #12 0x19eb9a73 in aura::Window::SetVisible(bool) ./../../ui/aura/window.cc:801:16
    #13 0x1b269d24 in UpdateTransientChildVisibility ./../../ui/wm/core/transient_window_manager.cc:163:14
    #14 0x1b269d24 in wm::TransientWindowManager::OnWindowVisibilityChanged(aura::Window*, bool) ./../../ui/wm/core/transient_window_manager.cc:182:0
    #15 0x19ecb567 in aura::Window::NotifyWindowVisibilityChangedAtReceiver(aura::Window*, bool) ./../../ui/aura/window.cc:1051:14
    #16 0x19eca96e in aura::Window::NotifyWindowVisibilityChangedDown(aura::Window*, bool) ./../../ui/aura/window.cc:1057:8
    #17 0x19eb9ab5 in NotifyWindowVisibilityChanged ./../../ui/aura/window.cc:1038:8
    #18 0x19eb9ab5 in aura::Window::SetVisible(bool) ./../../ui/aura/window.cc:803:0
    #19 0x1f370879 in BrowserView::CanClose() ./../../chrome/browser/ui/views/frame/browser_view.cc:1976:13
    #20 0x15857948 in views::Widget::Close() ./../../ui/views/widget/widget.cc:587:46
    #21 0x12bd03c7 in BrowserCloseManager::CloseBrowsers() ./../../chrome/browser/lifetime/browser_close_manager.cc:170:24
    #22 0x12bd0dd1 in BrowserCloseManager::TryToCloseBrowsers() ./../../chrome/browser/lifetime/browser_close_manager.cc:82:3
    #23 0x1250e917 in chrome::CloseAllBrowsers() ./../../chrome/browser/lifetime/application_lifetime.cc:192:26
    #24 0x1250fc3b in AttemptExitInternal ./../../chrome/browser/lifetime/application_lifetime.cc:148:39
    #25 0x1250fc3b in chrome::AttemptExit() ./../../chrome/browser/lifetime/application_lifetime.cc:295:0
    #26 0x11cac2d4 in Run ./../../base/callback.h:95:12
    #27 0x11cac2d4 in base::debug::TaskAnnotator::RunTask(char const*, base::PendingTask*) ./../../base/debug/task_annotator.cc:61:0
    #28 0x11d4f315 in base::MessageLoop::RunTask(base::PendingTask*) ./../../base/message_loop/message_loop.cc:391:25
    #29 0x11d50e33 in DeferOrRunPendingTask ./../../base/message_loop/message_loop.cc:403:5
    #30 0x11d50e33 in base::MessageLoop::DoWork() ./../../base/message_loop/message_loop.cc:447:0
    #31 0x11d5ee34 in HandleDispatch ./../../base/message_loop/message_pump_glib.cc:263:25
    #32 0x11d5ee34 in base::(anonymous namespace)::WorkSourceDispatch(_GSource*, int (*)(void*), void*) ./../../base/message_loop/message_pump_glib.cc:109:0
    #33 0x7fb4f8db464d in g_main_dispatch /home/tim/chromium/src/out/Instrumented-msan-chained-origins-trusty/gen/third_party/instrumented_libraries/libglib2.0-0/glib2.0-2.40.2/glib/gmain.c:3064:27
    #34 0x7fb4f8db464d in g_main_context_dispatch /home/tim/chromium/src/out/Instrumented-msan-chained-origins-trusty/gen/third_party/instrumented_libraries/libglib2.0-0/glib2.0-2.40.2/glib/gmain.c:3663:0
    #35 0x7fb4f8db587c in g_main_context_iterate /home/tim/chromium/src/out/Instrumented-msan-chained-origins-trusty/gen/third_party/instrumented_libraries/libglib2.0-0/glib2.0-2.40.2/glib/gmain.c:3734:5
    #36 0x7fb4f8db5bfd in g_main_context_iteration /home/tim/chromium/src/out/Instrumented-msan-chained-origins-trusty/gen/third_party/instrumented_libraries/libglib2.0-0/glib2.0-2.40.2/glib/gmain.c:3795:12
    #37 0x11d5e062 in base::MessagePumpGlib::Run(base::MessagePump::Delegate*) ./../../base/message_loop/message_pump_glib.cc:305:30
    #38 0x11e350cf in base::RunLoop::Run() ./../../base/run_loop.cc:130:14
    #39 0x13a7d86e in RunThisRunLoop ./../../content/public/test/test_utils.cc:127:13
    #40 0x13a7d86e in content::RunMessageLoop() ./../../content/public/test/test_utils.cc:121:0
    #41 0x1210b473 in InProcessBrowserTest::QuitBrowsers() ./../../chrome/test/base/in_process_browser_test.cc:546:3
    #42 0x1210b004 in InProcessBrowserTest::PostRunTestOnMainThread() ./../../chrome/test/base/in_process_browser_test.cc:522:3
    #43 0x1392164d in content::BrowserTestBase::ProxyRunTestOnMainThreadLoop() ./../../content/public/test/browser_test_base.cc:404:3
    #44 0x122fdb00 in Run ./../../base/callback.h:124:12
    #45 0x122fdb00 in ChromeBrowserMainParts::PreMainMessageLoopRunImpl() ./../../chrome/browser/chrome_browser_main.cc:2111:0
    #46 0x122f8c2f in ChromeBrowserMainParts::PreMainMessageLoopRun() ./../../chrome/browser/chrome_browser_main.cc:1442:18
    #47 0xb4c13ea in content::BrowserMainLoop::PreMainMessageLoopRun() ./../../content/browser/browser_main_loop.cc:1036:13
    #48 0xc9c1fc0 in Run ./../../base/callback.h:124:12
    #49 0xc9c1fc0 in content::StartupTaskRunner::RunAllTasksNow() ./../../content/browser/startup_task_runner.cc:45:0
    #50 0xb4b9b87 in content::BrowserMainLoop::CreateStartupTasks() ./../../content/browser/browser_main_loop.cc:951:25
    #51 0xb4d03aa in content::BrowserMainRunnerImpl::Initialize(content::MainFunctionParams const&) ./../../content/browser/browser_main_runner.cc:140:17
    #52 0xb4ad325 in content::BrowserMain(content::MainFunctionParams const&) ./../../content/browser/browser_main.cc:42:32
    #53 0x11ba9fe3 in content::RunNamedProcessTypeMain(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, content::MainFunctionParams const&, content::ContentMainDelegate*) ./../../content/app/content_main_runner.cc:423:14
    #54 0x11bacc58 in content::ContentMainRunnerImpl::Run() ./../../content/app/content_main_runner.cc:703:12
    #55 0x1a8638ef in service_manager::Main(service_manager::MainParams const&) ./../../services/service_manager/embedder/main.cc:453:29
    #56 0x11ba6497 in content::ContentMain(content::ContentMainParams const&) ./../../content/app/content_main.cc:19:10
    #57 0x1391f3d9 in content::BrowserTestBase::SetUp() ./../../content/public/test/browser_test_base.cc:320:3
    #58 0x121037e0 in InProcessBrowserTest::SetUp() ./../../chrome/test/base/in_process_browser_test.cc:238:20
    #59 0x86f7d2b in testing::Test::Run() ./../../third_party/googletest/src/googletest/src/gtest-internal-inl.h:0:10
    #60 0x86fbd29 in testing::TestInfo::Run() ./../../third_party/googletest/src/googletest/src/gtest.cc:2661:11
    #61 0x86fd759 in testing::TestCase::Run() ./../../third_party/googletest/src/googletest/src/gtest.cc:2779:28
    #62 0x8734724 in testing::internal::UnitTestImpl::RunAllTests() ./../../third_party/googletest/src/googletest/src/gtest.cc:5036:43
    #63 0x8733022 in testing::UnitTest::Run() ./../../third_party/googletest/src/googletest/src/gtest.cc:0:0
    #64 0x1216bdc0 in RUN_ALL_TESTS ./../../third_party/googletest/src/googletest/include/gtest/gtest.h:2314:46
    #65 0x1216bdc0 in base::TestSuite::Run() ./../../base/test/test_suite.cc:275:0
    #66 0x11c6ebb1 in ChromeTestSuiteRunner::RunTestSuite(int, char**) ./../../chrome/test/base/chrome_test_launcher.cc:66:38
    #67 0x13a6d0b5 in content::LaunchTests(content::TestLauncherDelegate*, unsigned long, int, char**) ./../../content/public/test/test_launcher.cc:625:31
    #68 0x11c701fd in LaunchChromeTests(unsigned long, content::TestLauncherDelegate*, int, char**) ./../../chrome/test/base/chrome_test_launcher.cc:171:10
    #69 0x11c6e96f in main ./../../chrome/test/base/browser_tests_main.cc:36:10
    #70 0x7fb4f0a09f44 in __libc_start_main /build/eglibc-SvCtMH/eglibc-2.19/csu/libc-start.c:287:0
    #71 0x253f029 in _start ??:0:0
  Uninitialized value was created by a heap deallocation
    #0 0x255eba9 in __interceptor_free /b/build/slave/linux_upload_clang/build/src/third_party/llvm/compiler-rt/lib/msan/msan_interceptors.cc:217:3
    #1 0x11d5bcb0 in operator= ./../../base/containers/vector_buffer.h:60:5
    #2 0x11d5bcb0 in SetCapacityTo ./../../base/containers/circular_deque.h:945:0
    #3 0x11d5bcb0 in base::circular_deque<base::PendingTask>::ExpandCapacityIfNecessary(unsigned long) ./../../base/containers/circular_deque.h:960:0
    #4 0x11d591b5 in emplace_back<base::PendingTask> ./../../base/containers/circular_deque.h:851:5
    #5 0x11d591b5 in push_back ./../../base/containers/circular_deque.h:835:0
    #6 0x11d591b5 in push ./../../buildtools/third_party/libc++/trunk/include/queue:289:0
    #7 0x11d591b5 in base::internal::IncomingTaskQueue::PostPendingTaskLockRequired(base::PendingTask*) ./../../base/message_loop/incoming_task_queue.cc:335:0
    #8 0x11d55492 in base::internal::IncomingTaskQueue::PostPendingTask(base::PendingTask*) ./../../base/message_loop/incoming_task_queue.cc:291:23
    #9 0x11d55294 in base::internal::IncomingTaskQueue::AddToIncomingQueue(base::Location const&, base::OnceCallback<void ()>, base::TimeDelta, base::Nestable) ./../../base/message_loop/incoming_task_queue.cc:85:10
    #10 0x11d5c25c in base::internal::MessageLoopTaskRunner::PostDelayedTask(base::Location const&, base::OnceCallback<void ()>, base::TimeDelta) ./../../base/message_loop/message_loop_task_runner.cc:31:27
    #11 0x11ebd03c in base::TaskRunner::PostTask(base::Location const&, base::OnceCallback<void ()>) ./../../base/task_runner.cc:44:10
    #12 0xb18be8f in content::ChildConnection::IOThreadContext::BindInterface(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, mojo::ScopedHandleBase<mojo::MessagePipeHandle>) ./../../content/common/service_manager/child_connection.cc:43:22
    #13 0xb18bafb in content::ChildConnection::BindInterface(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, mojo::ScopedHandleBase<mojo::MessagePipeHandle>) ./../../content/common/service_manager/child_connection.cc:137:13
    #14 0xca4e749 in content::UtilityProcessHost::BindInterface(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, mojo::ScopedHandleBase<mojo::MessagePipeHandle>) ./../../content/browser/utility_process_host.cc:180:33
    #15 0xc692d67 in void content::BindInterface<content::UtilityProcessHost, service_manager::mojom::ServiceFactory>(content::UtilityProcessHost*, mojo::InterfaceRequest<service_manager::mojom::ServiceFactory>) ./../../content/public/common/bind_interface_helpers.h:22:9
    #16 0xc690e21 in content::(anonymous namespace)::StartServiceInUtilityProcess(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, std::__1::basic_string<unsigned short, base::string16_internals::string16_char_traits, std::__1::allocator<unsigned short> > const&, base::Optional<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > >, mojo::InterfaceRequest<service_manager::mojom::Service>, mojo::InterfacePtr<service_manager::mojom::PIDReceiver>, service_manager::mojom::ConnectResult, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&) ./../../content/browser/service_manager/service_manager_context.cc:153:3
    #17 0xc691e4a in void base::internal::FunctorTraits<void (*)(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, std::__1::basic_string<unsigned short, base::string16_internals::string16_char_traits, std::__1::allocator<unsigned short> > const&, base::Optional<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > >, mojo::InterfaceRequest<service_manager::mojom::Service>, mojo::InterfacePtr<service_manager::mojom::PIDReceiver>, service_manager::mojom::ConnectResult, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&), void>::Invoke<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >, std::__1::basic_string<unsigned short, base::string16_internals::string16_char_traits, std::__1::allocator<unsigned short> >, base::Optional<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > >, mojo::InterfaceRequest<service_manager::mojom::Service>, mojo::InterfacePtr<service_manager::mojom::PIDReceiver>, service_manager::mojom::ConnectResult, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&>(void (*)(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, std::__1::basic_string<unsigned short, base::string16_internals::string16_char_traits, std::__1::allocator<unsigned short> > const&, base::Optional<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > >, mojo::InterfaceRequest<service_manager::mojom::Service>, mojo::InterfacePtr<service_manager::mojom::PIDReceiver>, service_manager::mojom::ConnectResult, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&), std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >&&, std::__1::basic_string<unsigned short, base::string16_internals::string16_char_traits, std::__1::allocator<unsigned short> >&&, base::Optional<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > >&&, mojo::InterfaceRequest<service_manager::mojom::Service>&&, mojo::InterfacePtr<service_manager::mojom::PIDReceiver>&&, service_manager::mojom::ConnectResult&&, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&&&) ./../../base/bind_internal.h:402:12
    #18 0xc6919b3 in MakeItSo<void (*)(const std::__1::basic_string<char> &, const std::__1::basic_string<base::char16, base::string16_internals::string16_char_traits> &, base::Optional<std::__1::basic_string<char> >, mojo::InterfaceRequest<service_manager::mojom::Service>, mojo::InterfacePtr<service_manager::mojom::PIDReceiver>, service_manager::mojom::ConnectResult, const std::__1::basic_string<char> &), std::__1::basic_string<char>, std::__1::basic_string<base::char16, base::string16_internals::string16_char_traits>, base::Optional<std::__1::basic_string<char> >, mojo::InterfaceRequest<service_manager::mojom::Service>, mojo::InterfacePtr<service_manager::mojom::PIDReceiver>, service_manager::mojom::ConnectResult, const std::__1::basic_string<char> &> ./../../base/bind_internal.h:530:12
    #19 0xc6919b3 in RunImpl<void (*)(const std::__1::basic_string<char> &, const std::__1::basic_string<base::char16, base::string16_internals::string16_char_traits> &, base::Optional<std::__1::basic_string<char> >, mojo::InterfaceRequest<service_manager::mojom::Service>, mojo::InterfacePtr<service_manager::mojom::PIDReceiver>, service_manager::mojom::ConnectResult, const std::__1::basic_string<char> &), std::__1::tuple<std::__1::basic_string<char>, std::__1::basic_string<base::char16, base::string16_internals::string16_char_traits>, base::Optional<std::__1::basic_string<char> >, mojo::InterfaceRequest<service_manager::mojom::Service>, mojo::InterfacePtr<service_manager::mojom::PIDReceiver> >, 0, 1, 2, 3, 4> ./../../base/bind_internal.h:604:0
    #20 0xc6919b3 in base::internal::Invoker<base::internal::BindState<void (*)(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, std::__1::basic_string<unsigned short, base::string16_internals::string16_char_traits, std::__1::allocator<unsigned short> > const&, base::Optional<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > >, mojo::InterfaceRequest<service_manager::mojom::Service>, mojo::InterfacePtr<service_manager::mojom::PIDReceiver>, service_manager::mojom::ConnectResult, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&), std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >, std::__1::basic_string<unsigned short, base::string16_internals::string16_char_traits, std::__1::allocator<unsigned short> >, base::Optional<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > >, mojo::InterfaceRequest<service_manager::mojom::Service>, mojo::InterfacePtr<service_manager::mojom::PIDReceiver> >, void (service_manager::mojom::ConnectResult, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&)>::RunOnce(base::internal::BindStateBase*, service_manager::mojom::ConnectResult, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&) ./../../base/bind_internal.h:572:0
    #21 0x16dba8c7 in Run ./../../base/callback.h:95:12
    #22 0x16dba8c7 in service_manager::mojom::Connector_QueryService_ForwardToCallback::Accept(mojo::Message*) ./gen/services/service_manager/public/mojom/connector.mojom.cc:740:0
    #23 0x16cafeb4 in mojo::InterfaceEndpointClient::HandleValidatedMessage(mojo::Message*) ./../../mojo/public/cpp/bindings/lib/interface_endpoint_client.cc:414:23
    #24 0x16cade2a in mojo::FilterChain::Accept(mojo::Message*) ./../../mojo/public/cpp/bindings/lib/filter_chain.cc:40:17
    #25 0x16ccaf42 in mojo::internal::MultiplexRouter::ProcessIncomingMessage(mojo::internal::MultiplexRouter::MessageWrapper*, mojo::internal::MultiplexRouter::ClientCallBehavior, base::SequencedTaskRunner*) ./../../mojo/public/cpp/bindings/lib/multiplex_router.cc:880:42
    #26 0x16cc85b8 in mojo::internal::MultiplexRouter::Accept(mojo::Message*) ./../../mojo/public/cpp/bindings/lib/multiplex_router.cc:604:38
    #27 0x16cade2a in mojo::FilterChain::Accept(mojo::Message*) ./../../mojo/public/cpp/bindings/lib/filter_chain.cc:40:17
SUMMARY: MemorySanitizer: use-of-uninitialized-value (/b/s/w/ir/out/Release/browser_tests+0x11e7c7a2)
Exiting
[18384:18384:0326/194759.870414:WARNING:x11_util.cc(1362)] X error received: serial 169, error_code 3 (BadWindow), request_code 4, minor_code 0 (Unknown)

Flakiness dashboard is all green (Mac 10.11 failures are probably due to something else): https://test-results.appspot.com/dashboards/flakiness_dashboard.html#testType=browser_tests&tests=ExtensionWebstorePrivateApiTest.IconUrl

It crashes only together with other tests.

Thanks for marking it as incorrect, we'll investigate at our next triage.