mus: Introduce API for embedder to dispatch event to the embeded client.

content/browser/renderer_host/render_widget_host_view_mus.cc

Index: content/browser/renderer_host/render_widget_host_view_mus.cc
diff --git a/content/browser/renderer_host/render_widget_host_view_mus.cc b/content/browser/renderer_host/render_widget_host_view_mus.cc
index 8df1594b79e4a8ed650c48ce343c72cfa73b041e..4fdb6c48223f48e9a63624cb5283742c12340a81 100644
--- a/content/browser/renderer_host/render_widget_host_view_mus.cc
+++ b/content/browser/renderer_host/render_widget_host_view_mus.cc
@@ -28,9 +28,15 @@ struct WebScreenInfo;
 
 namespace content {
 
+namespace {
+
+void OnEventAck(bool handled) {}
+
+}  // namespace
+
 RenderWidgetHostViewMus::RenderWidgetHostViewMus(mus::Window* parent_window,
                                                  RenderWidgetHostImpl* host)
-    : host_(host), aura_window_(nullptr) {
+    : host_(host), aura_window_(nullptr), weak_factory_(this) {
   DCHECK(parent_window);
   mus::Window* window = parent_window->window_tree()->NewWindow();
   window->SetVisible(true);
@@ -49,7 +55,9 @@ RenderWidgetHostViewMus::RenderWidgetHostViewMus(mus::Window* parent_window,
   factory->CreateWindowTreeClientForRenderWidget(
       host_->GetRoutingID(), mojo::GetProxy(&window_tree_client));
   mus_window_->window()->Embed(std::move(window_tree_client),
-                               mus::mojom::kEmbedFlagEmbedderInterceptsEvents);
+      base::Bind(&RenderWidgetHostViewMus::OnEmbed,
+                 weak_factory_.GetWeakPtr()),
+      mus::mojom::kEmbedFlagEmbedderInterceptsEvents);
 }
 
 RenderWidgetHostViewMus::~RenderWidgetHostViewMus() {}
@@ -61,6 +69,18 @@ void RenderWidgetHostViewMus::InternalSetBounds(const gfx::Rect& rect) {
   host_->WasResized();
 }
 
+void X() {
+}
+
+void RenderWidgetHostViewMus::OnEmbed(
+    bool success,
+    mus::mojom::InputEventHandlerPtr handler) {
+  DCHECK(success);
+  LOG(ERROR) << "Binding";
+  event_handler_ = std::move(handler);
+  event_handler_.set_connection_error_handler(base::Bind(&X));
+}
+
 void RenderWidgetHostViewMus::Show() {
   // TODO(fsamuel): Update visibility in Mus.
   // There is some interstitial complexity that we'll need to figure out here.
@@ -315,6 +335,20 @@ void RenderWidgetHostViewMus::OnWindowInputEvent(
     std::unique_ptr<base::Callback<void(mus::mojom::EventResult)>>*
         ack_callback) {
   // TODO(sad): Dispatch |event| to the RenderWidgetHost.
+  std::unique_ptr<ui::Event> send;
+  if (event.IsMouseEvent()) {
+    send = ui::Event::Clone(
+        ui::PointerEvent(static_cast<const ui::MouseEvent&>(event)));
+  } else {
+    send = ui::Event::Clone(event);
+  }
+  LOG(ERROR) << "X: " << window->server_id() << " vs. "
+      << mus_window_->window()->server_id();
+  event_handler_->OnInputEvent(mus_window_->window()->server_id(),
+                               std::move(send),
+                               base::Bind(&OnEventAck));
+  (*ack_callback)->Run(mus::mojom::EventResult::HANDLED);
+  ack_callback->reset();
 }
 
 }  // namespace content