Mark virtual/threaded Mac10.10 tests as slow.

Bug: 1065608
Change-Id: I06a99fbe1ad2d3168ed08503da6b13f7433e906d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2139751Reviewed-by: Stephen Chenney <schenney@chromium.org>
Commit-Queue: Rune Lillesveen <futhark@chromium.org>
Cr-Commit-Position: refs/heads/master@{#757042}

third_party/blink/web_tests/SlowTests

@@ -610,3 +610,11 @@ crbug.com/853360 [ Mac ] http/tests/misc/slow-loading-image-in-pattern.html [ Sl
 crbug.com/937546 [ Win7 ] http/tests/security/xss-DENIED-cross-origin-stack-overflow.html [ Slow ]
 
 crbug.com/1066517 http/tests/websocket/workers/worker-reload.html [ Slow ]
+
+# Sometimes exceeds timeout on Mac10.10
+crbug.com/24182 [ Mac10.10 ] virtual/threaded/external/wpt/css/css-scroll-snap/snap-after-initial-layout/writing-mode-vertical-rl.html [ Slow ]
+crbug.com/24182 [ Mac10.10 ] virtual/threaded/external/wpt/css/css-animations/parsing/animation-shorthand.html [ Slow ]
+crbug.com/24182 [ Mac10.10 ] virtual/threaded/external/wpt/css/css-scroll-snap/snap-to-visible-areas-both.html [ Slow ]
+crbug.com/24182 [ Mac10.10 ] virtual/threaded/external/wpt/css/css-animations/KeyframeEffect-getKeyframes.tentative.html [ Slow ]
+crbug.com/24182 [ Mac10.10 ] virtual/threaded/external/wpt/css/css-scroll-snap/snap-after-initial-layout/writing-mode-horizontal-tb.html [ Slow ]
+crbug.com/24182 [ Mac10.10 ] virtual/threaded/external/wpt/css/css-animations/CSSAnimation-canceling.tentative.html [ Slow ]

third_party/blink/web_tests/TestExpectations

@@ -3163,9 +3163,7 @@ crbug.com/626703 [ Linux ] external/wpt/css/css-overflow/webkit-line-clamp-035.h
 crbug.com/626703 [ Mac ] external/wpt/css/css-overflow/webkit-line-clamp-035.html [ Failure ]
 crbug.com/626703 [ Win ] external/wpt/css/css-overflow/webkit-line-clamp-035.html [ Failure ]
 crbug.com/626703 [ Mac10.14 ] external/wpt/preload/download-resources.html [ Timeout ]
-crbug.com/626703 [ Mac10.10 ] virtual/threaded/external/wpt/css/css-scroll-snap/snap-after-initial-layout/writing-mode-vertical-rl.html [ Timeout ]
 crbug.com/626703 [ Mac10.10 ] virtual/threaded/external/wpt/requestidlecallback/callback-invoked.html [ Timeout ]
-crbug.com/626703 [ Mac10.10 ] virtual/threaded/external/wpt/css/css-animations/parsing/animation-shorthand.html [ Timeout ]
 crbug.com/626703 [ Mac10.10 ] virtual/web-components-v0-disabled/external/wpt/html/semantics/forms/the-input-element/input-type-checkbox.html [ Timeout ]
 crbug.com/626703 [ Mac10.10 ] virtual/web-components-v0-disabled/external/wpt/html/semantics/forms/constraints/form-validation-validity-stepMismatch.html [ Timeout ]
 crbug.com/626703 [ Mac10.10 ] virtual/web-components-v0-disabled/external/wpt/html/dom/documents/dom-tree-accessors/document.getElementsByName/document.getElementsByName-interface.html [ Timeout ]
@@ -3177,7 +3175,6 @@ crbug.com/626703 [ Mac10.10 ] virtual/threaded/external/wpt/feature-policy/exper
 crbug.com/626703 [ Mac10.10 ] virtual/web-bluetooth-new-permissions-backend/external/wpt/bluetooth/requestDevice/canonicalizeFilter/max-length-exceeded-name-unicode.https.html [ Timeout ]
 crbug.com/626703 [ Mac10.10 ] virtual/web-bluetooth-new-permissions-backend/external/wpt/bluetooth/requestDevice/canonicalizeFilter/unicode-valid-length-name-name.https.html [ Timeout ]
 crbug.com/626703 [ Mac10.10 ] virtual/web-components-v0-disabled/external/wpt/html/dom/documents/dom-tree-accessors/document.getElementsByName/document.getElementsByName-same.html [ Timeout ]
-crbug.com/626703 [ Mac10.10 ] virtual/threaded/external/wpt/css/css-scroll-snap/snap-to-visible-areas-both.html [ Timeout ]
 crbug.com/626703 [ Mac10.10 ] virtual/web-bluetooth-new-permissions-backend/external/wpt/bluetooth/server/getPrimaryServices/gen-disconnect-called-during-success.https.window.html [ Timeout ]
 crbug.com/626703 [ Mac10.10 ] virtual/web-bluetooth-new-permissions-backend/external/wpt/bluetooth/characteristic/getDescriptors/gen-service-is-removed-with-uuid.https.window.html [ Timeout ]
 crbug.com/626703 [ Mac10.10 ] virtual/web-components-v0-disabled/external/wpt/html/semantics/embedded-content/media-elements/track/track-element/track-cue-negative-timestamp-events.html [ Timeout ]
@@ -3190,16 +3187,13 @@ crbug.com/626703 [ Mac10.10 ] virtual/web-bluetooth-new-permissions-backend/exte
 crbug.com/626703 [ Mac10.10 ] virtual/web-components-v0-disabled/external/wpt/html/semantics/embedded-content/media-elements/event_order_canplay_playing.html [ Timeout ]
 crbug.com/626703 [ Mac10.10 ] virtual/web-components-v0-disabled/external/wpt/dom/nodes/getElementsByClassName-26.htm [ Timeout ]
 crbug.com/626703 [ Mac10.10 ] virtual/web-bluetooth-new-permissions-backend/external/wpt/bluetooth/server/getPrimaryServices/gen-service-not-found-with-uuid.https.window.html [ Timeout ]
-crbug.com/626703 [ Mac10.10 ] virtual/threaded/external/wpt/css/css-animations/KeyframeEffect-getKeyframes.tentative.html [ Timeout ]
 crbug.com/626703 [ Mac10.10 ] virtual/web-components-v0-disabled/external/wpt/html/semantics/embedded-content/media-elements/event_order_canplay_canplaythrough.html [ Timeout ]
 crbug.com/626703 [ Mac10.10 ] virtual/web-bluetooth-new-permissions-backend/external/wpt/bluetooth/service/getCharacteristics/gen-reconnect-during.https.window.html [ Timeout ]
 crbug.com/626703 [ Mac10.10 ] virtual/web-components-v0-disabled/external/wpt/html/semantics/interactive-elements/the-summary-element/activation-behavior.html [ Timeout ]
 crbug.com/626703 [ Mac10.10 ] virtual/web-components-v0-disabled/external/wpt/dom/nodes/getElementsByClassName-08.htm [ Timeout ]
 crbug.com/626703 [ Mac10.10 ] virtual/web-bluetooth-new-permissions-backend/external/wpt/bluetooth/characteristic/startNotifications/gen-characteristic-is-removed.https.window.html [ Timeout ]
-crbug.com/626703 [ Mac10.10 ] virtual/threaded/external/wpt/css/css-scroll-snap/snap-after-initial-layout/writing-mode-horizontal-tb.html [ Timeout ]
 crbug.com/626703 [ Mac10.10 ] virtual/web-components-v0-disabled/external/wpt/html/semantics/embedded-content/the-iframe-element/sandbox_016.htm [ Timeout ]
 crbug.com/626703 [ Mac10.10 ] virtual/web-components-v0-disabled/external/wpt/html/dom/documents/dom-tree-accessors/nameditem-07.html [ Timeout ]
-crbug.com/626703 [ Mac10.10 ] virtual/threaded/external/wpt/css/css-animations/CSSAnimation-canceling.tentative.html [ Timeout ]
 crbug.com/626703 [ Mac10.10 ] external/wpt/css/css-fonts/matching/range-descriptor-reversed.html [ Failure ]
 crbug.com/626703 [ Mac10.12 ] external/wpt/css/css-fonts/matching/range-descriptor-reversed.html [ Failure ]
 crbug.com/626703 [ Linux ] external/wpt/workers/shared-worker-parse-error-failure.html [ Timeout ]