[mus+ash] Implements hit-test client in Aura

ui/aura/mus/window_port_mus.cc

Index: ui/aura/mus/window_port_mus.cc
diff --git a/ui/aura/mus/window_port_mus.cc b/ui/aura/mus/window_port_mus.cc
index 579cff8b11f86e0f54efa5e8a4b81b48e9f401e2..8452471a1e0fd634183ff6e27c456f765fee4e53 100644
--- a/ui/aura/mus/window_port_mus.cc
+++ b/ui/aura/mus/window_port_mus.cc
@@ -10,6 +10,7 @@
 #include "ui/aura/client/transient_window_client.h"
 #include "ui/aura/env.h"
 #include "ui/aura/mus/client_surface_embedder.h"
+#include "ui/aura/mus/hit_test_data_provider_mus.h"
 #include "ui/aura/mus/property_converter.h"
 #include "ui/aura/mus/window_tree_client.h"
 #include "ui/aura/mus/window_tree_client_delegate.h"
@@ -119,6 +120,7 @@ WindowPortMus::RequestLayerTreeFrameSink(
       gpu_memory_buffer_manager, nullptr /* shared_bitmap_manager */,
       nullptr /* synthetic_begin_frame_source */, std::move(sink_info),
       std::move(client_request),
+      base::MakeUnique<HitTestDataProviderMus>(window_),
       base::MakeUnique<viz::DefaultLocalSurfaceIdProvider>(),
       enable_surface_synchronization);
   window_tree_client_->AttachCompositorFrameSink(