Handle repeated headers when more than one table in paged context

third_party/WebKit/LayoutTests/fragmentation/repeating-thead-multiple-tables.html

Index: third_party/WebKit/LayoutTests/fragmentation/repeating-thead-multiple-tables.html
diff --git a/third_party/WebKit/LayoutTests/fragmentation/single-line-cells-repeating-thead-starts-middle-of-page.html b/third_party/WebKit/LayoutTests/fragmentation/repeating-thead-multiple-tables.html
similarity index 73%
copy from third_party/WebKit/LayoutTests/fragmentation/single-line-cells-repeating-thead-starts-middle-of-page.html
copy to third_party/WebKit/LayoutTests/fragmentation/repeating-thead-multiple-tables.html
index 41cc641476840dd66a3c338877df9fe079a44216..c24370297530d18fbdd065ff2012bb367bf4abe7 100644
--- a/third_party/WebKit/LayoutTests/fragmentation/single-line-cells-repeating-thead-starts-middle-of-page.html
+++ b/third_party/WebKit/LayoutTests/fragmentation/repeating-thead-multiple-tables.html
@@ -3,28 +3,18 @@
 table {
     border-collapse: collapse;
 }
-td, th {
-    background-color: #ddd;
-    border: 1px solid black;
-}
 thead, tr {
     break-inside: avoid;
 }
 </style>
-<p>crbug.com/24826: A table header group repeats on each page, even when the first one starts in the middle of the first page.</p>
-<div style="-webkit-columns:3; line-height: 20px; column-fill: auto; height:190px; background-color: yellow;">
-    <br>
-    <br>
-    <br>
-    <table>
-        <thead>
+<p>crbug.com/621258: Don't let repeating headers overlap on pages that contain two tables.</p>
+<div style="-webkit-columns:3; line-height: 20px; column-fill: auto; height:190px;">
+    <table id="top">
+        <thead id="top-thead">
             <tr>
-                <th>Col 1</th>
-                <th>Col 2</th>
+                <th colspan="2"><div>Col 1</div></th>
             </tr>
         </thead>
-        <tbody>
-        <tr><td>Te</td><td>xt</td></tr>
         <tr><td>Te</td><td>xt</td></tr>
         <tr><td>Te</td><td>xt</td></tr>
         <tr><td>Te</td><td>xt</td></tr>
@@ -34,6 +24,15 @@ thead, tr {
         <tr><td>Te</td><td>xt</td></tr>
         <tr><td>Te</td><td>xt</td></tr>
         <tr><td>Te</td><td>xt</td></tr>
+    </table>
+    <br>
+    <br>
+    <table id="second">
+        <thead id="top-thead">
+            <tr>
+                <th colspan="2"><div>Col 2</div></th>
+            </tr>
+        </thead>
         <tr><td>Te</td><td>xt</td></tr>
         <tr><td>Te</td><td>xt</td></tr>
         <tr><td>Te</td><td>xt</td></tr>
@@ -47,7 +46,6 @@ thead, tr {
         <tr><td>Te</td><td>xt</td></tr>
         <tr><td>Te</td><td>xt</td></tr>
         <tr><td>Te</td><td>xt</td></tr>
-        </tbody>
     </table>
 </div>