[css-grid] Migrate fixed-width-intrinsic-width-should-exclude-scrollbar-width-in-grid.html to WPT

BUG=767015, 1063749
R=rego@igalia.com

Change-Id: Ie7b38d16617059f7170c4e01c70ad7bf22cceec7
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2143834
Reviewed-by: Manuel Rego <rego@igalia.com>
Commit-Queue: Antonio Gomes <tonikitoo@igalia.com>
Cr-Commit-Position: refs/heads/master@{#759205}
diff --git a/css/css-grid/grid-model/fixed-width-intrinsic-width-should-exclude-scrollbar-001.html b/css/css-grid/grid-model/fixed-width-intrinsic-width-should-exclude-scrollbar-001.html
new file mode 100644
index 0000000..26b8f5e
--- /dev/null
+++ b/css/css-grid/grid-model/fixed-width-intrinsic-width-should-exclude-scrollbar-001.html
@@ -0,0 +1,35 @@
+<!DOCTYPE html>
+<html>
+<title>CSS Grid: intrinsic width of fixed-width grid items.</title>
+<link rel="author" title="Sunil Ratnu" href="mailto:sunil.ratnu@samsung.com"/>
+<link rel="help" href="https://drafts.csswg.org/css-grid-1/#overflow"/>
+<meta name="assert" content="This test ensures that scrollbar width is not accounted for fixed-width grid items' intrinsic width."/>
+<link href="/css/support/grid.css" rel="stylesheet"/>
+<style>
+.grid {
+    grid-template-columns: 400px 500px;
+    grid-template-rows: 200px 300px;
+}
+
+.gridItemScrollOverflow {
+    width: 50px;
+    height: 50px;
+    overflow: scroll;
+}
+
+</style>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/resources/check-layout-th.js"></script>
+<body onload="checkLayout('.grid')">
+
+<div class="grid">
+    <div class="firstRowFirstColumn gridItemScrollOverflow" data-expected-width="50" data-expected-height="50"></div>
+    <div class="firstRowSecondColumn gridItemScrollOverflow" data-expected-width="50" data-expected-height="50"></div>
+    <div class="secondRowFirstColumn gridItemScrollOverflow" data-expected-width="50" data-expected-height="50"></div>
+    <!-- Grid item itself being a grid container-->
+    <div class="grid secondRowSecondColumn gridItemScrollOverflow" data-expected-width="50" data-expected-height="50"></div>
+</div>
+
+</body>
+</html>