Convert app banners to use Mojo.

components/test_runner/web_test_interfaces.cc

Index: components/test_runner/web_test_interfaces.cc
diff --git a/components/test_runner/web_test_interfaces.cc b/components/test_runner/web_test_interfaces.cc
index a7e65e22ceacc443662090aee932ea5967054df0..c320100ebc5733069130e8bfb2f4955a950a49ac 100644
--- a/components/test_runner/web_test_interfaces.cc
+++ b/components/test_runner/web_test_interfaces.cc
@@ -7,7 +7,6 @@
 #include <utility>
 
 #include "base/memory/ptr_util.h"
-#include "components/test_runner/app_banner_client.h"
 #include "components/test_runner/mock_web_audio_device.h"
 #include "components/test_runner/mock_web_media_stream_center.h"
 #include "components/test_runner/mock_web_midi_accessor.h"
@@ -83,13 +82,6 @@ WebAudioDevice* WebTestInterfaces::CreateAudioDevice(double sample_rate) {
   return new MockWebAudioDevice(sample_rate);
 }
 
-std::unique_ptr<blink::WebAppBannerClient>
-WebTestInterfaces::CreateAppBannerClient() {
-  std::unique_ptr<AppBannerClient> client(new AppBannerClient);
-  interfaces_->SetAppBannerClient(client.get());
-  return std::move(client);
-}
-
 std::unique_ptr<WebFrameTestClient> WebTestInterfaces::CreateWebFrameTestClient(
     WebViewTestProxyBase* web_view_test_proxy_base,
     WebFrameTestProxyBase* web_frame_test_proxy_base) {