The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/40de29e435234862271d41cfa08f356f6b99bc50

commit 40de29e435234862271d41cfa08f356f6b99bc50
Author: Kim Paulhamus <kpaulhamus@chromium.org>
Date: Thu Dec 07 04:14:08 2017

Properly handle the enforcement of single requests to authenticator.mojom.

Add a test for the timeout in the authenticator impl.
Necessitates refactoring //device/u2f test code into a
test_support target to set up a service_manager::Connector.

Bug:  785950 ,  785950 
Change-Id: Idfd132a54909ceb8e7104e278434227ecac2c34c
Reviewed-on: https://chromium-review.googlesource.com/775912
Commit-Queue: Kim Paulhamus <kpaulhamus@chromium.org>
Reviewed-by: Reilly Grant <reillyg@chromium.org>
Reviewed-by: Daniel Cheng <dcheng@chromium.org>
Reviewed-by: Mike West <mkwst@chromium.org>
Cr-Commit-Position: refs/heads/master@{#522333}
[modify] https://crrev.com/40de29e435234862271d41cfa08f356f6b99bc50/content/browser/webauth/authenticator_impl.cc
[modify] https://crrev.com/40de29e435234862271d41cfa08f356f6b99bc50/content/browser/webauth/authenticator_impl.h
[modify] https://crrev.com/40de29e435234862271d41cfa08f356f6b99bc50/content/browser/webauth/authenticator_impl_unittest.cc
[modify] https://crrev.com/40de29e435234862271d41cfa08f356f6b99bc50/content/test/BUILD.gn
[modify] https://crrev.com/40de29e435234862271d41cfa08f356f6b99bc50/device/BUILD.gn
[modify] https://crrev.com/40de29e435234862271d41cfa08f356f6b99bc50/device/u2f/BUILD.gn
[modify] https://crrev.com/40de29e435234862271d41cfa08f356f6b99bc50/third_party/WebKit/LayoutTests/http/tests/credentialmanager/credentialscontainer-create-basics.html
[modify] https://crrev.com/40de29e435234862271d41cfa08f356f6b99bc50/third_party/WebKit/Source/modules/credentialmanager/CredentialManagerTypeConverters.cpp
[modify] https://crrev.com/40de29e435234862271d41cfa08f356f6b99bc50/third_party/WebKit/Source/modules/credentialmanager/CredentialManagerTypeConverters.h
[modify] https://crrev.com/40de29e435234862271d41cfa08f356f6b99bc50/third_party/WebKit/Source/modules/credentialmanager/CredentialsContainer.cpp
[modify] https://crrev.com/40de29e435234862271d41cfa08f356f6b99bc50/third_party/WebKit/Source/modules/credentialmanager/WebAuthenticationClient.cpp
[modify] https://crrev.com/40de29e435234862271d41cfa08f356f6b99bc50/third_party/WebKit/public/platform/modules/webauth/authenticator.mojom