[WPT] Mark passing grid tests as passing

Bug: 1112771
Change-Id: I6deb0aff7fbbe9d2bd7fd00f7452d5fc5cb2a2af
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2348538Reviewed-by: David Grogan <dgrogan@chromium.org>
Commit-Queue: Stephen Chenney <schenney@chromium.org>
Cr-Commit-Position: refs/heads/master@{#797007}

third_party/blink/web_tests/TestExpectations

@@ -6759,10 +6759,7 @@ crbug.com/1112304 external/wpt/html/cross-origin-opener-policy/popup-coop-by-sw-
 crbug.com/1112778 external/wpt/html/semantics/scripting-1/the-script-element/module/dynamic-import/alpha/base-url-worker.sub.html [ Pass Failure ]
 
 # Sheriff 2020-08-04: New wpt tests are failing
-crbug.com/1112771 external/wpt/css/css-grid/grid-definition/grid-template-columns-rows-resolved-values-001.tentative.html [ Failure ]
-crbug.com/1112771 external/wpt/css/css-grid/layout-algorithm/grid-flex-track-intrinsic-sizes-001.html [ Failure ]
 crbug.com/1112771 external/wpt/webhid/idlharness.https.window.html [ Failure ]
-crbug.com/1112771 external/wpt/css/css-grid/grid-definition/grid-inline-template-columns-rows-resolved-values-001.tentative.html [ Failure ]
 
 # Sheriff 2020-08-05
 crbug.com/1113050 fast/borders/border-radius-mask-video-ratio.html [ Pass Failure ]