p1 mus+ash chrome renders ui and content

ui/views/mus/window_tree_host_mus.cc

Index: ui/views/mus/window_tree_host_mus.cc
diff --git a/ui/views/mus/window_tree_host_mus.cc b/ui/views/mus/window_tree_host_mus.cc
index 7e01767aac928c4a2274e3fcc7a05f8b2668a204..5f0b82564d30f07ff34c0d9618b636c7dd2321b2 100644
--- a/ui/views/mus/window_tree_host_mus.cc
+++ b/ui/views/mus/window_tree_host_mus.cc
@@ -4,9 +4,11 @@
 
 #include "ui/views/mus/window_tree_host_mus.h"
 
+#include "components/bitmap_uploader/bitmap_uploader.h"
 #include "mojo/application/public/interfaces/shell.mojom.h"
 #include "ui/aura/window.h"
 #include "ui/aura/window_event_dispatcher.h"
+#include "ui/base/view_prop.h"
 #include "ui/events/event.h"
 #include "ui/views/mus/input_method_mus.h"
 #include "ui/views/mus/native_widget_mus.h"
@@ -31,6 +33,13 @@ WindowTreeHostMus::WindowTreeHostMus(mojo::Shell* shell,
   dispatcher()->set_transform_events(false);
   compositor()->SetHostHasTransparentBackground(true);
 
+  bitmap_uploader_.reset(new bitmap_uploader::BitmapUploader(window));
+  bitmap_uploader_->Init(shell);
+  prop_.reset(
+      new ui::ViewProp(GetAcceleratedWidget(),
+                       bitmap_uploader::kBitmapUploaderForAcceleratedWidget,
+                       bitmap_uploader_.get()));
+
   input_method_.reset(new InputMethodMUS(this, window));
   SetSharedInputMethod(input_method_.get());
 }