diff --git a/LayoutTests/ChangeLog b/LayoutTests/ChangeLog
index a4d3b90..be72471 100644
--- a/LayoutTests/ChangeLog
+++ b/LayoutTests/ChangeLog
@@ -1,3 +1,15 @@
+2019-05-14  Oriol Brufau  <obrufau@igalia.com>
+
+        [css-grid] Update grid when changing auto repeat type
+        https://bugs.webkit.org/show_bug.cgi?id=197849
+
+        Reviewed by Javier Fernandez.
+
+        Remove the test which has been upstreamed to WPT.
+
+        * fast/css-grid-layout/grid-change-auto-repeat-tracks-expected.txt: Removed.
+        * fast/css-grid-layout/grid-change-auto-repeat-tracks.html: Removed.
+
 2019-05-14  Antti Koivisto  <antti@apple.com>
 
         Event region computation should respect transforms
diff --git a/LayoutTests/fast/css-grid-layout/grid-change-auto-repeat-tracks-expected.txt b/LayoutTests/fast/css-grid-layout/grid-change-auto-repeat-tracks-expected.txt
deleted file mode 100644
index 9faf22e..0000000
--- a/LayoutTests/fast/css-grid-layout/grid-change-auto-repeat-tracks-expected.txt
+++ /dev/null
@@ -1,25 +0,0 @@
-This test checks that grid-template-{rows|columns} with auto-repeat tracks recomputes the positions of automatically placed grid items.
-PASS
-PASS
-PASS
-PASS
-PASS
-PASS
-PASS
-PASS
-PASS
-PASS
-PASS
-PASS
-PASS
-PASS
-PASS
-PASS
-PASS
-PASS
-PASS
-PASS
-PASS
-PASS
-PASS
-PASS
diff --git a/LayoutTests/fast/css-grid-layout/grid-change-auto-repeat-tracks.html b/LayoutTests/fast/css-grid-layout/grid-change-auto-repeat-tracks.html
deleted file mode 100644
index 12ec660..0000000
--- a/LayoutTests/fast/css-grid-layout/grid-change-auto-repeat-tracks.html
+++ /dev/null
@@ -1,136 +0,0 @@
-<!DOCTYPE html>
-<link href="resources/grid.css" rel="stylesheet">
-<style>
-.grid {
-    grid-auto-rows: 25px;
-    grid-auto-columns: 25px;
-    margin-bottom: 10px;
-}
-
-.fixedWidth {
-    width: 50px;
-    grid-auto-flow: row;
-    grid-template-columns: repeat(auto-fill, 25px);
-}
-
-.fixedHeight {
-    width: 100px;
-    height: 50px;
-    grid-auto-flow: column;
-    grid-template-rows: repeat(auto-fill, 25px);
-}
-
-#i1, #i21 {
-    grid-row: auto;
-    grid-column: 1;
-    background-color: orange;
-}
-
-#i2, #i22 {
-    grid-row: 1;
-    grid-column: auto;
-    background-color: green;
-}
-
-#i3, #i23 {
-    grid-row: auto;
-    grid-column: auto;
-    background-color: blue;
-}
-</style>
-<!-- Explicitly not using layout-th because it does not allow multiple checkLayout(). -->
-<script src="../../resources/check-layout.js"></script>
-<script>
-function setGridTemplate(id, gridTemplateRows, gridTemplateColumns)
-{
-     var gridElement = document.getElementById(id);
-     gridElement.style.gridTemplateRows = gridTemplateRows;
-     gridElement.style.gridTemplateColumns = gridTemplateColumns;
-}
-
-function setGridSize(id, width, height)
-{
-     var gridElement = document.getElementById(id);
-     gridElement.style.width = width;
-     gridElement.style.height = height;
-}
-
-function testGridTemplates(firstGridItemData, secondGridItemData, thirdGridItemData)
-{
-    var i1 = document.getElementById(firstGridItemData.id);
-    i1.setAttribute("data-expected-width", firstGridItemData.width);
-    i1.setAttribute("data-expected-height", firstGridItemData.height);
-    i1.setAttribute("data-offset-x", firstGridItemData.x);
-    i1.setAttribute("data-offset-y", firstGridItemData.y);
-
-    var i2 = document.getElementById(secondGridItemData.id);
-    i2.setAttribute("data-expected-width", secondGridItemData.width);
-    i2.setAttribute("data-expected-height", secondGridItemData.height);
-    i2.setAttribute("data-offset-x", secondGridItemData.x);
-    i2.setAttribute("data-offset-y", secondGridItemData.y);
-
-    var i3 = document.getElementById(thirdGridItemData.id);
-    i3.setAttribute("data-expected-width", thirdGridItemData.width);
-    i3.setAttribute("data-expected-height", thirdGridItemData.height);
-    i3.setAttribute("data-offset-x", thirdGridItemData.x);
-    i3.setAttribute("data-offset-y", thirdGridItemData.y);
-
-    checkLayout(".grid");
-}
-
-function testChangingGridDefinitions()
-{
-     // Test changing the number of auto-repeat tracks.
-     setGridTemplate('grid1', 'none', 'repeat(auto-fill, 25px)');
-     testGridTemplates({ 'id': 'i1', 'width': '25', 'height': '25', 'x': '0', 'y': '25' }, { 'id': 'i2', 'width': '25', 'height': '25', 'x': '0', 'y': '0' }, { 'id': 'i3', 'width': '25', 'height': '25', 'x': '25', 'y': '25' });
-     setGridTemplate('grid2', 'repeat(auto-fill, 25px)', 'none');
-     testGridTemplates({ 'id': 'i21', 'width': '25', 'height': '25', 'x': '0', 'y': '0' }, { 'id': 'i22', 'width': '25', 'height': '25', 'x': '25', 'y': '0' }, { 'id': 'i23', 'width': '25', 'height': '25', 'x': '25', 'y': '25' });
-
-     setGridTemplate('grid1', 'none', 'none');
-     testGridTemplates({ 'id': 'i1', 'width': '25', 'height': '25', 'x': '0', 'y': '25' }, { 'id': 'i2', 'width': '25', 'height': '25', 'x': '0', 'y': '0' }, { 'id': 'i3', 'width': '25', 'height': '25', 'x': '0', 'y': '50' });
-     setGridTemplate('grid2', 'none', 'none');
-     testGridTemplates({ 'id': 'i21', 'width': '25', 'height': '25', 'x': '0', 'y': '0' }, { 'id': 'i22', 'width': '25', 'height': '25', 'x': '25', 'y': '0' }, { 'id': 'i23', 'width': '25', 'height': '25', 'x': '50', 'y': '0' });
-
-     setGridTemplate('grid1', 'none', '5px repeat(auto-fill, 20px)');
-     testGridTemplates({ 'id': 'i1', 'width': '5', 'height': '25', 'x': '0', 'y': '25' }, { 'id': 'i2', 'width': '5', 'height': '25', 'x': '0', 'y': '0' }, { 'id': 'i3', 'width': '20', 'height': '25', 'x': '5', 'y': '25' });
-     setGridTemplate('grid2', 'repeat(auto-fill, 20px) 3px', 'none');
-     testGridTemplates({ 'id': 'i21', 'width': '25', 'height': '20', 'x': '0', 'y': '0' }, { 'id': 'i22', 'width': '25', 'height': '20', 'x': '25', 'y': '0' }, { 'id': 'i23', 'width': '25', 'height': '20', 'x': '25', 'y': '20' });
-
-     setGridTemplate('grid1', 'none', '5px repeat(auto-fill, 22px)');
-     testGridTemplates({ 'id': 'i1', 'width': '5', 'height': '25', 'x': '0', 'y': '25' }, { 'id': 'i2', 'width': '5', 'height': '25', 'x': '0', 'y': '0' }, { 'id': 'i3', 'width': '22', 'height': '25', 'x': '5', 'y': '25' });
-     setGridTemplate('grid2', 'repeat(auto-fill, 18px) 3px', 'none');
-     testGridTemplates({ 'id': 'i21', 'width': '25', 'height': '18', 'x': '0', 'y': '0' }, { 'id': 'i22', 'width': '25', 'height': '18', 'x': '25', 'y': '0' }, { 'id': 'i23', 'width': '25', 'height': '18', 'x': '25', 'y': '18' });
-
-     setGridTemplate('grid1', 'none', 'repeat(auto-fill, 45px)');
-     testGridTemplates({ 'id': 'i1', 'width': '45', 'height': '25', 'x': '0', 'y': '25' }, { 'id': 'i2', 'width': '45', 'height': '25', 'x': '0', 'y': '0' }, { 'id': 'i3', 'width': '45', 'height': '25', 'x': '0', 'y': '50' });
-     setGridTemplate('grid2', 'repeat(auto-fill, 45px)', 'none');
-     testGridTemplates({ 'id': 'i21', 'width': '25', 'height': '45', 'x': '0', 'y': '0' }, { 'id': 'i22', 'width': '25', 'height': '45', 'x': '25', 'y': '0' }, { 'id': 'i23', 'width': '25', 'height': '45', 'x': '50', 'y': '0' });
-
-     // Test changing the size of the grid.
-     setGridSize('grid1', '100px', 'auto');
-     testGridTemplates({ 'id': 'i1', 'width': '45', 'height': '25', 'x': '0', 'y': '25' }, { 'id': 'i2', 'width': '45', 'height': '25', 'x': '0', 'y': '0' }, { 'id': 'i3', 'width': '45', 'height': '25', 'x': '45', 'y': '25' });
-     setGridSize('grid2', '100px', '100px');
-     testGridTemplates({ 'id': 'i21', 'width': '25', 'height': '45', 'x': '0', 'y': '0' }, { 'id': 'i22', 'width': '25', 'height': '45', 'x': '25', 'y': '0' }, { 'id': 'i23', 'width': '25', 'height': '45', 'x': '25', 'y': '45' });
-}
-
-window.addEventListener("load", testChangingGridDefinitions, false);
-</script>
-
-<div>This test checks that grid-template-{rows|columns} with auto-repeat tracks recomputes the positions of automatically placed grid items.</div>
-<div id="log"></div>
-
-<div style="position: relative">
-    <div id="grid1" class="grid fixedWidth">
-        <div id="i1"></div>
-        <div id="i2"></div>
-        <div id="i3"></div>
-    </div>
-</div>
-
-<div style="position: relative">
-    <div id="grid2" class="grid fixedHeight">
-        <div id="i21"></div>
-        <div id="i22"></div>
-        <div id="i23"></div>
-    </div>
-</div>
diff --git a/LayoutTests/imported/w3c/ChangeLog b/LayoutTests/imported/w3c/ChangeLog
index 06b7495..7e0e47b 100644
--- a/LayoutTests/imported/w3c/ChangeLog
+++ b/LayoutTests/imported/w3c/ChangeLog
@@ -1,3 +1,16 @@
+2019-05-14  Oriol Brufau  <obrufau@igalia.com>
+
+        [css-grid] Update grid when changing auto repeat type
+        https://bugs.webkit.org/show_bug.cgi?id=197849
+
+        Reviewed by Javier Fernandez.
+
+        Import WPT test.
+
+        * web-platform-tests/css/css-grid/grid-definition/grid-change-auto-repeat-tracks-expected.txt: Added.
+        * web-platform-tests/css/css-grid/grid-definition/grid-change-auto-repeat-tracks.html: Added.
+        * web-platform-tests/css/css-grid/grid-definition/w3c-import.log:
+
 2019-05-14  Manuel Rego Casasnovas  <rego@igalia.com>
 
         [css-grid] Use max size to compute auto repeat tracks
diff --git a/LayoutTests/imported/w3c/web-platform-tests/css/css-grid/grid-definition/grid-change-auto-repeat-tracks-expected.txt b/LayoutTests/imported/w3c/web-platform-tests/css/css-grid/grid-definition/grid-change-auto-repeat-tracks-expected.txt
new file mode 100644
index 0000000..5854bec
--- /dev/null
+++ b/LayoutTests/imported/w3c/web-platform-tests/css/css-grid/grid-definition/grid-change-auto-repeat-tracks-expected.txt
@@ -0,0 +1,20 @@
+
+Harness Error (FAIL), message = 2 duplicate test names: ".grid 1", ".grid 2"
+
+PASS .grid 1 
+PASS .grid 2 
+PASS .grid 1 
+PASS .grid 2 
+PASS .grid 1 
+PASS .grid 2 
+PASS .grid 1 
+PASS .grid 2 
+PASS .grid 1 
+PASS .grid 2 
+PASS .grid 1 
+PASS .grid 2 
+PASS .grid 1 
+PASS .grid 2 
+PASS .grid 1 
+PASS .grid 2 
+
diff --git a/LayoutTests/imported/w3c/web-platform-tests/css/css-grid/grid-definition/grid-change-auto-repeat-tracks.html b/LayoutTests/imported/w3c/web-platform-tests/css/css-grid/grid-definition/grid-change-auto-repeat-tracks.html
new file mode 100644
index 0000000..33fcb24
--- /dev/null
+++ b/LayoutTests/imported/w3c/web-platform-tests/css/css-grid/grid-definition/grid-change-auto-repeat-tracks.html
@@ -0,0 +1,178 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>CSS Grid Layout Test: Support 'repeat()' notation for 'grid-template-columns' and 'grid-template-rows' properties</title>
+<link rel="author" title="Oriol Brufau" href="mailto:obrufau@igalia.com">
+<link rel="help" href="http://www.w3.org/TR/css-grid-1/#repeat-notation" title="5.1.2 Repeating Rows and Columns: the 'repeat()' notation">
+<meta name="assert" content="This test checks that grid-template-{rows|columns} with auto-repeat tracks recomputes the positions of automatically placed grid items.">
+
+<link href="support/grid.css" rel="stylesheet">
+<style>
+.grid {
+  grid-auto-rows: 25px;
+  grid-auto-columns: 25px;
+  margin-bottom: 10px;
+}
+.fixedWidth {
+  width: 50px;
+  grid-auto-flow: row;
+  grid-template-columns: repeat(auto-fill, 25px);
+}
+.fixedHeight {
+  width: 100px;
+  height: 50px;
+  grid-auto-flow: column;
+  grid-template-rows: repeat(auto-fill, 25px);
+}
+#i1-1, #i2-1 {
+  grid-row: auto;
+  grid-column: 1;
+  background-color: orange;
+}
+#i1-2, #i2-2 {
+  grid-row: 1;
+  grid-column: auto;
+  background-color: green;
+}
+#i1-3, #i2-3 {
+  grid-row: auto;
+  grid-column: auto;
+  background-color: blue;
+}
+</style>
+
+<div id="log"></div>
+
+<div style="position: relative">
+  <div id="grid1" class="grid fixedWidth">
+    <div id="i1-1"></div>
+    <div id="i1-2"></div>
+    <div id="i1-3"></div>
+  </div>
+</div>
+<div style="position: relative">
+  <div id="grid2" class="grid fixedHeight">
+    <div id="i2-1"></div>
+    <div id="i2-2"></div>
+    <div id="i2-3"></div>
+  </div>
+</div>
+
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/resources/check-layout-th.js"></script>
+<script>
+function setGridTemplate(id, gridTemplateRows, gridTemplateColumns) {
+  let gridElement = document.getElementById(id);
+  gridElement.style.gridTemplateRows = gridTemplateRows;
+  gridElement.style.gridTemplateColumns = gridTemplateColumns;
+}
+
+function setGridSize(id, width, height) {
+  let gridElement = document.getElementById(id);
+  gridElement.style.width = width;
+  gridElement.style.height = height;
+}
+
+function setGridItemPlacement(id, gridRow, gridColumn) {
+  let gridItem = document.getElementById(id);
+  gridItem.style.gridRow = gridRow;
+  gridItem.style.gridColumn = gridColumn;
+}
+
+function testGridDefinitions(...gridItemDataList) {
+  for (let gridItemData of gridItemDataList) {
+    let gridItem = document.getElementById(gridItemData.id);
+    gridItem.setAttribute("data-expected-width", gridItemData.width);
+    gridItem.setAttribute("data-expected-height", gridItemData.height);
+    gridItem.setAttribute("data-offset-x", gridItemData.x);
+    gridItem.setAttribute("data-offset-y", gridItemData.y);
+  }
+  checkLayout(".grid", false);
+}
+
+// Test changing the number of auto-repeat tracks.
+setGridTemplate('grid1', 'none', 'repeat(auto-fill, 25px)');
+setGridTemplate('grid2', 'repeat(auto-fill, 25px)', 'none');
+testGridDefinitions(
+  { id: 'i1-1', width: '25', height: '25', x: '0', y: '25' },
+  { id: 'i1-2', width: '25', height: '25', x: '0', y: '0' },
+  { id: 'i1-3', width: '25', height: '25', x: '25', y: '25' },
+  { id: 'i2-1', width: '25', height: '25', x: '0', y: '0' },
+  { id: 'i2-2', width: '25', height: '25', x: '25', y: '0' },
+  { id: 'i2-3', width: '25', height: '25', x: '25', y: '25' });
+
+setGridTemplate('grid1', 'none', 'none');
+setGridTemplate('grid2', 'none', 'none');
+testGridDefinitions(
+  { id: 'i1-1', width: '25', height: '25', x: '0', y: '25' },
+  { id: 'i1-2', width: '25', height: '25', x: '0', y: '0' },
+  { id: 'i1-3', width: '25', height: '25', x: '0', y: '50' },
+  { id: 'i2-1', width: '25', height: '25', x: '0', y: '0' },
+  { id: 'i2-2', width: '25', height: '25', x: '25', y: '0' },
+  { id: 'i2-3', width: '25', height: '25', x: '50', y: '0' });
+
+setGridTemplate('grid1', 'none', '5px repeat(auto-fill, 20px)');
+setGridTemplate('grid2', 'repeat(auto-fill, 20px) 3px', 'none');
+testGridDefinitions(
+  { id: 'i1-1', width: '5', height: '25', x: '0', y: '25' },
+  { id: 'i1-2', width: '5', height: '25', x: '0', y: '0' },
+  { id: 'i1-3', width: '20', height: '25', x: '5', y: '25' },
+  { id: 'i2-1', width: '25', height: '20', x: '0', y: '0' },
+  { id: 'i2-2', width: '25', height: '20', x: '25', y: '0' },
+  { id: 'i2-3', width: '25', height: '20', x: '25', y: '20' });
+
+setGridTemplate('grid1', 'none', '5px repeat(auto-fill, 22px)');
+setGridTemplate('grid2', 'repeat(auto-fill, 18px) 3px', 'none');
+testGridDefinitions(
+  { id: 'i1-1', width: '5', height: '25', x: '0', y: '25' },
+  { id: 'i1-2', width: '5', height: '25', x: '0', y: '0' },
+  { id: 'i1-3', width: '22', height: '25', x: '5', y: '25' },
+  { id: 'i2-1', width: '25', height: '18', x: '0', y: '0' },
+  { id: 'i2-2', width: '25', height: '18', x: '25', y: '0' },
+  { id: 'i2-3', width: '25', height: '18', x: '25', y: '18' });
+
+setGridTemplate('grid1', 'none', 'repeat(auto-fill, 45px)');
+setGridTemplate('grid2', 'repeat(auto-fill, 45px)', 'none');
+testGridDefinitions(
+  { id: 'i1-1', width: '45', height: '25', x: '0', y: '25' },
+  { id: 'i1-2', width: '45', height: '25', x: '0', y: '0' },
+  { id: 'i1-3', width: '45', height: '25', x: '0', y: '50' },
+  { id: 'i2-1', width: '25', height: '45', x: '0', y: '0' },
+  { id: 'i2-2', width: '25', height: '45', x: '25', y: '0' },
+  { id: 'i2-3', width: '25', height: '45', x: '50', y: '0' });
+
+// Test changing the size of the grid.
+setGridSize('grid1', '100px', 'auto');
+setGridSize('grid2', '100px', '100px');
+testGridDefinitions(
+  { id: 'i1-1', width: '45', height: '25', x: '0', y: '25' },
+  { id: 'i1-2', width: '45', height: '25', x: '0', y: '0' },
+  { id: 'i1-3', width: '45', height: '25', x: '45', y: '25' },
+  { id: 'i2-1', width: '25', height: '45', x: '0', y: '0' },
+  { id: 'i2-2', width: '25', height: '45', x: '25', y: '0' },
+  { id: 'i2-3', width: '25', height: '45', x: '25', y: '45' });
+
+// Move the third item so that there is an empty track between it and the others.
+setGridItemPlacement('i1-3', 'auto', '3');
+setGridItemPlacement('i2-3', '3', 'auto');
+testGridDefinitions(
+  { id: 'i1-1', width: '45', height: '25', x: '0', y: '25' },
+  { id: 'i1-2', width: '45', height: '25', x: '0', y: '0' },
+  { id: 'i1-3', width: '25', height: '25', x: '90', y: '25' },
+  { id: 'i2-1', width: '25', height: '45', x: '0', y: '0' },
+  { id: 'i2-2', width: '25', height: '45', x: '25', y: '0' },
+  { id: 'i2-3', width: '25', height: '25', x: '25', y: '90' });
+
+// Set the same templates, but using auto-fit instead of auto-fill. The empty track should collapse.
+setGridTemplate('grid1', 'none', 'repeat(auto-fit, 45px)');
+setGridTemplate('grid2', 'repeat(auto-fit, 45px)', 'none');
+testGridDefinitions(
+  { id: 'i1-1', width: '45', height: '25', x: '0', y: '25' },
+  { id: 'i1-2', width: '45', height: '25', x: '0', y: '0' },
+  { id: 'i1-3', width: '25', height: '25', x: '45', y: '25' },
+  { id: 'i2-1', width: '25', height: '45', x: '0', y: '0' },
+  { id: 'i2-2', width: '25', height: '45', x: '25', y: '0' },
+  { id: 'i2-3', width: '25', height: '25', x: '25', y: '45' });
+
+done();
+</script>
diff --git a/LayoutTests/imported/w3c/web-platform-tests/css/css-grid/grid-definition/w3c-import.log b/LayoutTests/imported/w3c/web-platform-tests/css/css-grid/grid-definition/w3c-import.log
index 7e0710a..3716d9d 100644
--- a/LayoutTests/imported/w3c/web-platform-tests/css/css-grid/grid-definition/w3c-import.log
+++ b/LayoutTests/imported/w3c/web-platform-tests/css/css-grid/grid-definition/w3c-import.log
@@ -23,6 +23,7 @@
 /LayoutTests/imported/w3c/web-platform-tests/css/css-grid/grid-definition/grid-auto-repeat-min-max-size-001.html
 /LayoutTests/imported/w3c/web-platform-tests/css/css-grid/grid-definition/grid-auto-repeat-min-size-001.html
 /LayoutTests/imported/w3c/web-platform-tests/css/css-grid/grid-definition/grid-auto-repeat-min-size-002.html
+/LayoutTests/imported/w3c/web-platform-tests/css/css-grid/grid-definition/grid-change-auto-repeat-tracks.html
 /LayoutTests/imported/w3c/web-platform-tests/css/css-grid/grid-definition/grid-change-fit-content-argument-001.html
 /LayoutTests/imported/w3c/web-platform-tests/css/css-grid/grid-definition/grid-inline-auto-repeat-001.html
 /LayoutTests/imported/w3c/web-platform-tests/css/css-grid/grid-definition/grid-inline-support-flexible-lengths-001.html
diff --git a/Source/WebCore/ChangeLog b/Source/WebCore/ChangeLog
index 7e2f5e6..b244766 100644
--- a/Source/WebCore/ChangeLog
+++ b/Source/WebCore/ChangeLog
@@ -1,3 +1,23 @@
+2019-05-14  Oriol Brufau  <obrufau@igalia.com>
+
+        [css-grid] Update grid when changing auto repeat type
+        https://bugs.webkit.org/show_bug.cgi?id=197849
+
+        Reviewed by Javier Fernandez.
+
+        Test: imported/w3c/web-platform-tests/css/css-grid/grid-definition/grid-change-auto-repeat-tracks.html
+
+        This patch makes two 'repeat()' values for 'grid-template' be considered
+        to be different if one uses 'auto-fill' and the other 'auto-fit'.
+
+        Previously, they were considered to be equal if the repeated values
+        were the same, without comparing the repeat type. Therefore, the grid
+        was not updated when setting both values one after the other.
+
+        * css/CSSGridAutoRepeatValue.cpp:
+        (WebCore::CSSGridAutoRepeatValue::equals const):
+        * css/CSSGridAutoRepeatValue.h:
+
 2019-05-14  Antti Koivisto  <antti@apple.com>
 
         Event region computation should respect transforms
diff --git a/Source/WebCore/css/CSSGridAutoRepeatValue.cpp b/Source/WebCore/css/CSSGridAutoRepeatValue.cpp
index d5bc449..773177fd 100644
--- a/Source/WebCore/css/CSSGridAutoRepeatValue.cpp
+++ b/Source/WebCore/css/CSSGridAutoRepeatValue.cpp
@@ -46,4 +46,9 @@
     return result.toString();
 }
 
+bool CSSGridAutoRepeatValue::equals(const CSSGridAutoRepeatValue& other) const
+{
+    return m_autoRepeatID == other.m_autoRepeatID && CSSValueList::equals(other);
+}
+
 } // namespace WebCore
diff --git a/Source/WebCore/css/CSSGridAutoRepeatValue.h b/Source/WebCore/css/CSSGridAutoRepeatValue.h
index 774c81f..20780f4 100644
--- a/Source/WebCore/css/CSSGridAutoRepeatValue.h
+++ b/Source/WebCore/css/CSSGridAutoRepeatValue.h
@@ -54,6 +54,8 @@
     }
 
     String customCSSText() const;
+    bool equals(const CSSGridAutoRepeatValue&) const;
+
     CSSValueID autoRepeatID() const { return m_autoRepeatID; }
 
 private: