Convert app banners to use Mojo.

components/test_runner/test_runner.cc

Index: components/test_runner/test_runner.cc
diff --git a/components/test_runner/test_runner.cc b/components/test_runner/test_runner.cc
index 86185b48a8917e53e83714249e615ee18fc4d34a..541efbc7c6a32a27a7bec7f2ac98d29be60efb90 100644
--- a/components/test_runner/test_runner.cc
+++ b/components/test_runner/test_runner.cc
@@ -14,7 +14,6 @@
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/stringprintf.h"
 #include "build/build_config.h"
-#include "components/test_runner/app_banner_client.h"
 #include "components/test_runner/layout_and_paint_async_then.h"
 #include "components/test_runner/layout_dump.h"
 #include "components/test_runner/mock_content_settings_client.h"
@@ -2672,9 +2671,7 @@ void TestRunner::SetPermission(const std::string& name,
 void TestRunner::ResolveBeforeInstallPromptPromise(
     int request_id,
     const std::string& platform) {
-  if (!test_interfaces_->GetAppBannerClient())
-    return;
-  test_interfaces_->GetAppBannerClient()->ResolvePromise(request_id, platform);
+  delegate_->ResolveBeforeInstallPromptPromise(request_id, platform);
 }
 
 void TestRunner::SetPOSIXLocale(const std::string& locale) {