Deflake idle-callback/timeout.html LayoutTest.

LayoutTests/virtual/threaded/fast/idle-callback/timeout.html

Index: LayoutTests/virtual/threaded/fast/idle-callback/timeout.html
diff --git a/LayoutTests/virtual/threaded/fast/idle-callback/timeout.html b/LayoutTests/virtual/threaded/fast/idle-callback/timeout.html
index 42a819136367a33689dd9cbd2f5eb09797c66e2c..cbf0a2d38550b89c2af58563c1e68a14958a6a14 100644
--- a/LayoutTests/virtual/threaded/fast/idle-callback/timeout.html
+++ b/LayoutTests/virtual/threaded/fast/idle-callback/timeout.html
@@ -44,7 +44,6 @@ async_test(function() {
   var idle_callback = this.step_func(function(deadline) {
     var time_delta = performance.now() - idle_callback_scheduled;
     assert_true(time_delta >= timeout, "Should only have been run after timeout");
-    assert_true(time_delta - timeout <= 80, "Should have been scheduled close to timeout");
     assert_true(deadline.timeRemaining == 0, "IdleDeadline.timeRemaining MUST be equal to zero if requestIdleCallback was scheduled due to a timeout");
     assert_true(deadline.didTimeout, "IdleDeadline.didTimeout MUST be true if requestIdleCallback was scheduled due to a timeout");
     assert_true(busy_raf_loop_iterations_remaining > 0, "Busy rAF loop should still be going");