Runtime support for upcoming .NET Core WinRT Host (#23402)

* First pass at adding winrt host entry-point.

* There's no way to specify HResult-swapping on a function called via hosted-interop so just return the HResult instead.

* Use the WindowsRuntimeMarshal class to create the activation factory and initialize it.

* Implement loading the dependent assemblies of a WinRT assembly into an isolated load context.

* PR Feedback.

* Fail to get the activation factory if the found type is not a managed type exported from a winmd.

* Rearrange parameters based on PR feedback.

* Remove unneeded include.

* Make ActivationFactoryLoader internal.

* Fix null-ref in WinRT-dependent-assembly loading

* Remove extraneous "System."

1 files changed, 11 insertions, 0 deletions

diff --git a/src/vm/clrprivbinderwinrt.h b/src/vm/clrprivbinderwinrt.h
index e9cc1dfe9a..da6f0d53f7 100644
--- a/src/vm/clrprivbinderwinrt.h
+++ b/src/vm/clrprivbinderwinrt.h
@@ -323,6 +323,16 @@ public:
         DWORD               dwImageType, 
         DWORD *             pdwImageType, 
         ICLRPrivResource ** ppIResource);
+
+    void SetFallbackBinder(ICLRPrivBinder* fallbackBinder)
+    {
+        m_FallbackBinder = clr::SafeAddRef(fallbackBinder);
+    }
+
+    ICLRPrivBinder* GetFallbackBinder()
+    {
+        return m_FallbackBinder;
+    }
     
 private:
     //=============================================================================================
@@ -336,4 +346,5 @@ private:
     ReleaseHolder<IBindResult> m_pIBindResult;
     BOOL m_fShareable;
     Volatile<DWORD> m_dwImageTypes;
+    ReleaseHolder<ICLRPrivBinder> m_FallbackBinder;
 };  // class CLRPrivAssemblyWinRT