test: re-enable webview resize events test (#33220)

spec/webview-spec.js

@@ -1214,9 +1214,7 @@ describe('<webview> tag', function () {
 
     const generateSpecs = (description, sandbox) => {
       describe(description, () => {
-        // TODO(nornagon): disabled during chromium roll 2019-06-11 due to a
-        // 'ResizeObserver loop limit exceeded' error on Windows
-        xit('emits resize events', async () => {
+        it('emits resize events', async () => {
           const firstResizeSignal = waitForEvent(webview, 'resize');
           const domReadySignal = waitForEvent(webview, 'dom-ready');