[OLD ATTEMPT, DO NOT REVIEW] mustash: Enable connections to mus from the Chrome renderer

content/browser/renderer_host/render_widget_host_view_mus.h

Index: content/browser/renderer_host/render_widget_host_view_mus.h
diff --git a/content/browser/renderer_host/render_widget_host_view_mus.h b/content/browser/renderer_host/render_widget_host_view_mus.h
index 9974e4100507d97dda90d76f15a58803e003bf62..8c80d95a19e5dde268c9fa3fcb40b71e1a118883 100644
--- a/content/browser/renderer_host/render_widget_host_view_mus.h
+++ b/content/browser/renderer_host/render_widget_host_view_mus.h
@@ -6,7 +6,11 @@
 #define CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_MUS_H_
 
 #include "base/macros.h"
+#include "components/mus/public/cpp/scoped_window_ptr.h"
+#include "components/mus/public/cpp/window.h"
+#include "components/mus/public/interfaces/window_tree.mojom.h"
 #include "content/browser/renderer_host/render_widget_host_view_base.h"
+#include "content/public/browser/render_process_host_observer.h"
 
 namespace content {
 
@@ -26,10 +30,15 @@ struct NativeWebKeyboardEvent;
 class CONTENT_EXPORT RenderWidgetHostViewMus : public RenderWidgetHostViewBase {
  public:
   RenderWidgetHostViewMus(
+      mus::Window* parent_window,
       RenderWidgetHostImpl* widget,
       base::WeakPtr<RenderWidgetHostViewBase> platform_view);
   ~RenderWidgetHostViewMus() override;
 
+  void Embed(mus::mojom::WindowTreeClientPtr tree_client);
+
+  RenderWidgetHostViewMus* AsMusView() override;
+
  private:
   // RenderWidgetHostView implementation.
   void InitAsChild(gfx::NativeView parent_view) override;
@@ -119,7 +128,7 @@ class CONTENT_EXPORT RenderWidgetHostViewMus : public RenderWidgetHostViewBase {
 #endif
 
   RenderWidgetHostImpl* host_;
-  gfx::Size size_;
+  scoped_ptr<mus::ScopedWindowPtr> window_;
   // The platform view for this RenderWidgetHostView.
   // RenderWidgetHostViewMus mostly only cares about stuff related to
   // compositing, the rest are directly forwared to this |platform_view_|.