Fix flaky popup-blocking-timers6.html.

Bug: 1046256
Change-Id: If98bfe75ce859bd9b88c39923c740618129c8d6d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2024915
Commit-Queue: Mustaq Ahmed <mustaq@chromium.org>
Reviewed-by: Navid Zolghadr <nzolghadr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#735946}

third_party/blink/web_tests/TestExpectations

@@ -6447,7 +6447,5 @@ crbug.com/1043043 http/tests/devtools/elements/styles-4/styles-inline-element-st
 crbug.com/1046201 [ Mac ] fast/forms/calendar-picker/calendar-picker-appearance-zoom125.html [ Pass Failure ]
 crbug.com/1046201 [ Mac ] virtual/cascade/fast/forms/calendar-picker/calendar-picker-appearance-zoom125.html [ Pass Failure ]
 crbug.com/1046201 [ Win10 ] virtual/cascade/fast/forms/calendar-picker/calendar-picker-appearance-zoom125.html [ Pass Failure ]
-crbug.com/1046256 fast/events/popup-blocking-timers6.html [ Pass Failure Timeout ]
-crbug.com/1046256 virtual/mouseevent_fractional/fast/events/popup-blocking-timers6.html [ Pass Failure Timeout ]
 crbug.com/1042848 virtual/audio-service/external/wpt/mediacapture-streams/idlharness.https.window.html [ Pass Timeout ]
 crbug.com/1042848 virtual/feature-policy-permissions/external/wpt/mediacapture-streams/idlharness.https.window.html [ Pass Timeout ]

third_party/blink/web_tests/fast/events/popup-blocking-timers6-expected.txt

@@ -3,5 +3,5 @@ PASS successfullyParsed is true
 
 TEST COMPLETE
 
-Test calling window.open() with a 5001 ms delay. A popup should not be allowed.
+Test calling window.open() with a 5000+ ms delay. A popup should not be allowed.
 PASS newWindow is null

third_party/blink/web_tests/fast/events/popup-blocking-timers6.html

@@ -15,14 +15,14 @@
             setTimeout(function() {
                 newWindow = window.open("about:blank");
                 self.focus();
-                debug("Test calling window.open() with a 5001 ms delay. A popup should not be allowed.")
+                debug("Test calling window.open() with a 5000+ ms delay. A popup should not be allowed.")
                 shouldBeNull("newWindow");
 
                 if (window.testRunner)
                     testRunner.notifyDone();
-            }, 5001);
+            }, 5020);
             if (window.eventSender)
-                eventSender.leapForward(5001);
+                eventSender.leapForward(5020);
         }
 
         function clickButton() {