Allow whitespace inside anonymous table cells

Source/core/dom/Text.cpp

Index: Source/core/dom/Text.cpp
diff --git a/Source/core/dom/Text.cpp b/Source/core/dom/Text.cpp
index 4f46e8abb87b7a02e36d8616e7d9793b75794c77..71ce46fafe31b261b867f458704327e75b04cf5b 100644
--- a/Source/core/dom/Text.cpp
+++ b/Source/core/dom/Text.cpp
@@ -237,12 +237,31 @@ PassRefPtrWillBeRawPtr<Node> Text::cloneNode(bool /*deep*/)
     return cloneWithData(data());
 }
 
+static inline bool hasGeneratedAnonymousTableCells(const LayoutObject& parent)
+{
+    // We're checking whether the table part has generated anonymous table
+    // part wrappers to hold its contents, so inspecting its first child will suffice.
+    LayoutObject* child = parent.slowFirstChild();
+    if (!child || !child->isAnonymous())
+        return false;
+    if (child->isTableCell())
+        return true;
+    if (child->isTableSection() || child->isTableRow())
+        return hasGeneratedAnonymousTableCells(*child);
+    return false;
+}
+
 static inline bool canHaveWhitespaceChildren(const LayoutObject& parent)
 {
     // <button> should allow whitespace even though LayoutFlexibleBox doesn't.
     if (parent.isLayoutButton())
         return true;
 
+    // Allow whitespace when the text is inside a table, section or row element that
+    // has generated anonymous table cells to hold its contents.
+    if (hasGeneratedAnonymousTableCells(parent))
+        return true;
+
     if (parent.isTable() || parent.isTableRow() || parent.isTableSection()
         || parent.isLayoutTableCol() || parent.isFrameSet()
         || parent.isFlexibleBox() || parent.isLayoutGrid()