WaitDistilled() was called without checking its return value. If distillation times out or fails, the state doesn't reach Distilled, but the test proceeds to look for a DOM element that only exists in distilled HTML, resulting in a misleading timeout error. All other calls to WaitDistilled() in this file use ASSERT_TRUE(WaitDistilled()), which catches the failure early with a clear error message. Resolves brave/brave-browser#54582