refactor: Port renderer/web-view to TypeScript (#17250)

typings/internal-electron.d.ts

@@ -80,6 +80,34 @@ declare namespace ElectronInternal {
     on(channel: string, listener: (event: IpcMainInternalEvent, ...args: any[]) => void): this;
     once(channel: string, listener: (event: IpcMainInternalEvent, ...args: any[]) => void): this;
   }
+
+  interface WebFrameInternal extends Electron.WebFrame {
+    getWebFrameId(window: Window): number;
+    allowGuestViewElementDefinition(window: Window, context: any): void;
+  }
+
+  interface WebFrameResizeEvent extends Electron.Event {
+    newWidth: number;
+    newHeight: number;
+  }
+
+  interface WebViewEvent extends Event {
+    url: string;
+    isMainFrame: boolean;
+  }
+
+  abstract class WebViewElement extends HTMLElement {
+    static observedAttributes: Array<string>;
+
+    public contentWindow: Window;
+
+    public connectedCallback(): void;
+    public attributeChangedCallback(): void;
+    public disconnectedCallback(): void;
+
+    // Created in web-view-impl
+    public getWebContents(): Electron.WebContents;
+  }
 }
 
 declare namespace Chrome {