Import wpt@e431163eb7e1a2411801ca35f6f4a9d6e0d3bed4

Using wpt-import in Chromium aa597178.
With Chromium commits locally applied on WPT:
d5cd6b98 "SharedWorker: Assign unique names to SharedWorkers to avoid unintentional matching"
acf33020 "Add testing for the scrolling attribute"


Note to sheriffs: This CL imports external tests and adds
expectations for those tests; if this CL is large and causes
a few new failures, please fix the failures by adding new
lines to TestExpectations rather than reverting. See:
https://chromium.googlesource.com/chromium/src/+/master/docs/testing/web_platform_tests.md

Directory owners for changes in this CL:
kojii@chromium.org, mstensho@chromium.org:
  external/wpt/css/CSS2

NOAUTOREVERT=true
TBR=robertma

No-Export: true
Change-Id: I7b7b2d99b1e57d0d00a47fd92380a06e10ae5449
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2095076Reviewed-by: WPT Autoroller <wpt-autoroller@chops-service-accounts.iam.gserviceaccount.com>
Commit-Queue: WPT Autoroller <wpt-autoroller@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#748184}

third_party/blink/web_tests/external/wpt/css/CSS2/floats/floats-wrap-bfc-outside-001-ref.xht

@@ -5,7 +5,7 @@
 #wrap {width:600px; border:1px solid;position:relative}
 .a {background:lime; color:#fff; width:80%;}
 .b {position:absolute; right:0; width:18%; background: cyan; color: #000; height:10em;}
-textarea {width: 100%; height:10em;}
+textarea {box-sizing: border-box; width: 100%; height:10em;}
 </style>
 
 <title>test</title>

third_party/blink/web_tests/external/wpt/css/CSS2/floats/floats-wrap-bfc-outside-001.xht

@@ -10,7 +10,7 @@
 #wrap {width:600px; border:1px solid;}
 .a {background:lime; color:#fff; width:80%;}
 .b {float:right; width:18%; background: cyan; color: #000; height:10em;}
-textarea {width: 100%; height:10em;}
+textarea {box-sizing: border-box;width: 100%; height:10em;}
 </style>
 
 </head>

third_party/blink/web_tests/external/wpt/html/rendering/widgets/baseline-alignment-and-overflow.tentative.html

@@ -213,6 +213,8 @@ This table gets populated by the script.
 
     for (const row of testTBody.children) {
       const input = row.firstChild.lastElementChild;
+      // FIXME: This test makes assumptions about default form control styling
+      // that don't hold in all platforms.
       const allowedDelta = 3;
       // This is not using test() because promise_setup() only allows promise_test().
       promise_test(async () => {