Convert app banners to use Mojo.

components/test_runner/app_banner_service.cc

+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "components/test_runner/app_banner_service.h"
+
+namespace test_runner {
+
+AppBannerService::AppBannerService(int request_id) : request_id_(request_id) {}
+
+AppBannerService::~AppBannerService() {}
+
+void AppBannerService::BindHandle(mojo::ScopedMessagePipeHandle handle) {
+  binding_.reset(new mojo::Binding<blink::mojom::AppBannerService>(
+      this,
+      mojo::MakeRequest<blink::mojom::AppBannerService>(std::move(handle))));
+}
+
+void AppBannerService::ResolvePromise(int request_id,
+                                      const std::string& platform) {
+  if (request_id != request_id_)
+    return;
+
+  // Empty platform means to resolve as a dismissal.
+  if (platform.empty())
+    (*event_)->BannerDismissed(request_id);
+  else
+    (*event_)->BannerAccepted(request_id, platform);
+}
+
+void AppBannerService::DisplayAppBanner(int request_id) {}
+
+void AppBannerService::SetEvent(blink::mojom::AppBannerEventPtr event) {
+  event_.reset(new blink::mojom::AppBannerEventPtr(std::move(event)));
+}
+
+}  // namespace test_runner