Upstream cl/397127984

Author: bicknellr

packages/custom-elements/ts_src/CustomElementInternals.ts

@@ -413,7 +413,7 @@ export default class CustomElementInternals {
       return;
     }
 
-    return (registry as CustomElementRegistry).internal_localNameToDefinition(
+    return (registry as any as CustomElementRegistry).internal_localNameToDefinition(
       localName
     );
   }
@@ -436,7 +436,7 @@ export default class CustomElementInternals {
     // Only create custom elements if the document is associated with a
     // registry.
     if (registry && (namespace === null || namespace === NS_HTML)) {
-      const definition = (registry as CustomElementRegistry).internal_localNameToDefinition(
+      const definition = (registry as any as CustomElementRegistry).internal_localNameToDefinition(
         localName
       );
       if (definition) {

packages/custom-elements/ts_src/Patch/HTMLElement.ts

@@ -25,7 +25,7 @@ export default function (internals: CustomElementInternals) {
 
     // Always look up the definition from the global registry.
     const registry = document.__CE_registry!;
-    const definition = (registry as CustomElementRegistry).internal_constructorToDefinition(
+    const definition = (registry as any as CustomElementRegistry).internal_constructorToDefinition(
       constructor
     );
     if (!definition) {

packages/custom-elements/ts_src/custom-elements.ts

@@ -43,7 +43,7 @@ function installPolyfill() {
   const customElements = new CustomElementRegistry(internals);
 
   // The main document is associated with the global registry.
-  document.__CE_registry = customElements;
+  document.__CE_registry = customElements as any;
 
   Object.defineProperty(window, 'customElements', {
     configurable: true,