See https://build.chromium.org/p/tryserver.chromium.linux/builders/linux_chromium_asan_rel_ng/builds/142216

SerialApiTest.SetControlSignals (run #1):
[ RUN      ] SerialApiTest.SetControlSignals
[16214:16214:0407/041450:41728261375:WARNING:console.cc(109)] Could not log "[SUCCESS] testSetControlSignals": no render frame found
[       OK ] SerialApiTest.SetControlSignals (1354 ms)
[----------] 1 test from SerialApiTest (1354 ms total)

[----------] Global test environment tear-down
[==========] 1 test from 1 test case ran. (1355 ms total)
[  PASSED  ] 1 test.

=================================================================
==16214==ERROR: LeakSanitizer: detected memory leaks

Direct leak of 640 byte(s) in 10 object(s) allocated from:
    #0 0x54d05b in operator new(unsigned long) (/tmp/runY50y7p/out/Release/extensions_unittests+0x54d05b)
    #1 0xe4a413 in Create mojo/edk/js/handle.h:30:39
    #2 0xe4a413 in gin::Converter<mojo::Handle, void>::ToV8(v8::Isolate*, mojo::Handle const&) mojo/edk/js/handle.cc:53
    #3 0xb49e9f in ConvertToV8<mojo::Handle> gin/converter.h:211:10
    #4 0xb49e9f in TryConvertToV8 gin/converter.h:239
    #5 0xb49e9f in TryConvertToV8<mojo::Handle> gin/converter.h:248
    #6 0xb49e9f in Return<mojo::Handle> gin/arguments.h:72
    #7 0xb49e9f in DispatchToCallback<mojo::Handle> gin/function_template.h:176
    #8 0xb49e9f in gin::internal::Dispatcher<mojo::Handle (extensions::TestServiceProvider*, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&)>::DispatchToCallback(v8::FunctionCallbackInfo<v8::Value> const&) gin/function_template.h:217
    #9 0x41603dd in v8::internal::FunctionCallbackArguments::Call(void (*)(v8::FunctionCallbackInfo<v8::Value> const&)) v8/src/api-arguments.cc:16:3
    #10 0x3216f33 in v8::internal::MaybeHandle<v8::internal::Object> v8::internal::(anonymous namespace)::HandleApiCallHelper<false>(v8::internal::Isolate*, v8::internal::(anonymous namespace)::BuiltinArguments<(v8::internal::BuiltinExtraArguments)1>) v8/src/builtins.cc:4344:29
    #11 0x32b1b25 in v8::internal::Builtin_Impl_HandleApiCall(v8::internal::(anonymous namespace)::BuiltinArguments<(v8::internal::BuiltinExtraArguments)1>, v8::internal::Isolate*) v8/src/builtins.cc:4362:3
    #12 0x324834c in v8::internal::Builtin_HandleApiCall(int, v8::internal::Object**, v8::internal::Isolate*) v8/src/builtins.cc:4359:1
    #13 0x7fddd5b09326  (<unknown module>)
    #14 0x7fddd5c5a3f5  (<unknown module>)
    #15 0x7fddd5b34a9a  (<unknown module>)
    #16 0x7fddd5c5a29a  (<unknown module>)
    #17 0x7fddd5c5a1af  (<unknown module>)
    #18 0x7fddd5c596a5  (<unknown module>)
    #19 0x7fddd5c59316  (<unknown module>)
    #20 0x7fddd5b3c2e2  (<unknown module>)
    #21 0x7fddd5b24cae  (<unknown module>)
    #22 0x3781ff1 in v8::internal::(anonymous namespace)::Invoke(v8::internal::Isolate*, bool, v8::internal::Handle<v8::internal::Object>, v8::internal::Handle<v8::internal::Object>, int, v8::internal::Handle<v8::internal::Object>*, v8::internal::Handle<v8::internal::Object>) v8/src/execution.cc:97:13
    #23 0x3781664 in v8::internal::Execution::Call(v8::internal::Isolate*, v8::internal::Handle<v8::internal::Object>, v8::internal::Handle<v8::internal::Object>, int, v8::internal::Handle<v8::internal::Object>*) v8/src/execution.cc:153:10
    #24 0x3782a3b in v8::internal::Execution::TryCall(v8::internal::Isolate*, v8::internal::Handle<v8::internal::Object>, v8::internal::Handle<v8::internal::Object>, int, v8::internal::Handle<v8::internal::Object>*, v8::internal::MaybeHandle<v8::internal::Object>*) v8/src/execution.cc:191:20
    #25 0x3a020da in v8::internal::Isolate::RunMicrotasksInternal() v8/src/isolate.cc:2784:5
    #26 0x3a0083f in v8::internal::Isolate::RunMicrotasks() v8/src/isolate.cc:2769:3
    #27 0xb473be in extensions::ApiTestEnvironment::RunPromisesAgain() extensions/renderer/api_test_base.cc:217:3
    #28 0xc97091 in Run base/callback.h:397:12
    #29 0xc97091 in base::debug::TaskAnnotator::RunTask(char const*, base::PendingTask const&) base/debug/task_annotator.cc:51
    #30 0xbb52d3 in base::MessageLoop::RunTask(base::PendingTask const&) base/message_loop/message_loop.cc:479:3
    #31 0xbb5ea5 in base::MessageLoop::DeferOrRunPendingTask(base::PendingTask const&) base/message_loop/message_loop.cc:488:5
    #32 0xbb67fc in base::MessageLoop::DoWork() base/message_loop/message_loop.cc:600:13
    #33 0xbbee8c in base::MessagePumpDefault::Run(base::MessagePump::Delegate*) base/message_loop/message_pump_default.cc:33:21
    #34 0xbb44d9 in base::MessageLoop::RunHandler() base/message_loop/message_loop.cc:443:3
    #35 0xbe9afa in base::RunLoop::Run() base/run_loop.cc:35:3
    #36 0xb46be7 in extensions::ApiTestEnvironment::RunTest(std::__1::basic_string<char, std::__1::char_traits<char>, s