Fix flaky part of searching

Flaky part between type and press

Bug: none
Change-Id: If612d5c5e968c58cb152bb98d9c5ccdcee8485d8
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/6263810
Reviewed-by: Alina Varkki <[email protected]>
Commit-Queue: Alina Varkki <[email protected]>
Commit-Queue: Nikolay Vitkov <[email protected]>
Auto-Submit: Nikolay Vitkov <[email protected]>

Author: Lightning00Blade

test/e2e/helpers/performance-helpers.ts

@@ -93,6 +93,7 @@ export async function searchForComponent(frontend: puppeteer.Page, searchEntry:
   // TODO: it should actually wait for rendering to finish.
   await drainFrontendTaskQueue();
   await frontend.keyboard.type(searchEntry);
+  await drainFrontendTaskQueue();
   await frontend.keyboard.press('Tab');
   // TODO: it should actually wait for rendering to finish.
   await drainFrontendTaskQueue();