GitLab

WebTestInterfaces::GetAppBannerClient can be removed, because
TestRunner::ResolveBeforeInstallPromptPromise can interact with
AppBannerClient directly, rather than going through WebTestDelegate.
This also means that components/test_runner/app_banner_client.h header
no longer needs to be included outside of components/test_runner.

BUG=595089

Review URL: https://codereview.chromium.org/1807643002

Cr-Commit-Position: refs/heads/master@{#381797}