Enable WebFrame method forwarding in sandboxed renderers (#12538)

* Enable WebFrame method forwarding in sandboxed renderers

Fixes #9073

* Non-change to kick CI

lib/renderer/web-frame-init.js

@@ -0,0 +1,38 @@
+const electron = require('electron')
+
+module.exports = () => {
+  // Call webFrame method
+  electron.ipcRenderer.on('ELECTRON_INTERNAL_RENDERER_WEB_FRAME_METHOD', (event, method, args) => {
+    electron.webFrame[method](...args)
+  })
+
+  electron.ipcRenderer.on('ELECTRON_INTERNAL_RENDERER_SYNC_WEB_FRAME_METHOD', (event, requestId, method, args) => {
+    const result = electron.webFrame[method](...args)
+    event.sender.send(`ELECTRON_INTERNAL_BROWSER_SYNC_WEB_FRAME_RESPONSE_${requestId}`, result)
+  })
+
+  electron.ipcRenderer.on('ELECTRON_INTERNAL_RENDERER_ASYNC_WEB_FRAME_METHOD', (event, requestId, method, args) => {
+    const responseCallback = function (result) {
+      Promise.resolve(result)
+        .then((resolvedResult) => {
+          event.sender.send(`ELECTRON_INTERNAL_BROWSER_ASYNC_WEB_FRAME_RESPONSE_${requestId}`, null, resolvedResult)
+        })
+        .catch((resolvedError) => {
+          if (resolvedError instanceof Error) {
+            // Errors get lost, because: JSON.stringify(new Error('Message')) === {}
+            // Take the serializable properties and construct a generic object
+            resolvedError = {
+              message: resolvedError.message,
+              stack: resolvedError.stack,
+              name: resolvedError.name,
+              __ELECTRON_SERIALIZED_ERROR__: true
+            }
+          }
+
+          event.sender.send(`ELECTRON_INTERNAL_BROWSER_ASYNC_WEB_FRAME_RESPONSE_${requestId}`, resolvedError)
+        })
+    }
+    args.push(responseCallback)
+    electron.webFrame[method](...args)
+  })
+}