Use itScreenshot in screenshot test

It was changed by accident in https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/6421725

Bug: none
Change-Id: Ic4f674beb7df0ab1a70eda9b3a9617cfa8e63747
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/6425301
Commit-Queue: Andres Olivares <[email protected]>
Commit-Queue: Alina Varkki <[email protected]>
Feels: Alina Varkki <[email protected]>
Auto-Submit: Andres Olivares <[email protected]>
Reviewed-by: Alina Varkki <[email protected]>

Author: and-oli

test/interactions/panels/performance/timeline/timeline_test.ts

@@ -117,7 +117,7 @@ describe('Performance panel', function() {
         await assertElementScreenshotUnchanged(panel, 'performance/timeline-expand-network-panel-and-select-event.png');
       });
 
-  it('renders the window range bounds correctly when loading multiple profiles', async () => {
+  itScreenshot('renders the window range bounds correctly when loading multiple profiles', async () => {
     await loadComponentDocExample('performance_panel/basic.html?cpuprofile=basic');
     let timingTitleHandle = await waitFor('.summary-range');
     let timingTitle = await timingTitleHandle.evaluate(element => element.innerHTML);