Convert editing/deleting/delete-at-paragraph-boundaries-008.html to use w3c test harness

third_party/WebKit/LayoutTests/editing/deleting/delete_at_paragraph_boundaries.html

Index: third_party/WebKit/LayoutTests/editing/deleting/delete_at_paragraph_boundaries.html
diff --git a/third_party/WebKit/LayoutTests/editing/deleting/delete_at_paragraph_boundaries.html b/third_party/WebKit/LayoutTests/editing/deleting/delete_at_paragraph_boundaries.html
index c2fe5741da7e7a879bb87ee1fcf725c2872b7f29..4bd4b6c7b3ea1f47b80a0204c517ba004be57aa8 100644
--- a/third_party/WebKit/LayoutTests/editing/deleting/delete_at_paragraph_boundaries.html
+++ b/third_party/WebKit/LayoutTests/editing/deleting/delete_at_paragraph_boundaries.html
@@ -118,4 +118,23 @@
             '</div>',
         ].join('')),
         'Deleting when a selection starts at the beginning of a paragraph preceded by another block and extends into the middle of a following paragraph.');
+
+
+    test(() => assert_selection(
+        [
+            '<div contenteditable>',
+                '<div>',
+                    'one<p>two</p><p>three</p><p>fo^ur|</p>',
+                '</div>',
+            '</div>',
+        ].join(''),
+        'delete',
+        [
+            '<div contenteditable>',
+                '<div>',
+                    'one<p>two</p><p>three</p><p>fo|</p>',
+                '</div>',
+            '</div>',
+        ].join('')),
+        'Deleting when a selection starts in the middle of the last paragraph and extends to the end of that paragraph');
 </script>