Change deleteCell behavior when there are no cells

third_party/WebKit/Source/core/html/HTMLTableRowElement.cpp

Index: third_party/WebKit/Source/core/html/HTMLTableRowElement.cpp
diff --git a/third_party/WebKit/Source/core/html/HTMLTableRowElement.cpp b/third_party/WebKit/Source/core/html/HTMLTableRowElement.cpp
index 189ed69fcb9275e61213562f6403c7a4c839e53d..28a99e7876580e3e60fc89ee0f05c83b6b5398ab 100644
--- a/third_party/WebKit/Source/core/html/HTMLTableRowElement.cpp
+++ b/third_party/WebKit/Source/core/html/HTMLTableRowElement.cpp
@@ -110,8 +110,11 @@ void HTMLTableRowElement::deleteCell(int index,
                                      ExceptionState& exceptionState) {
   HTMLCollection* children = cells();
   int numCells = children ? children->length() : 0;
-  if (index == -1)
+  if (index == -1) {
+    if (numCells == 0)
+      return;
     index = numCells - 1;
+  }
   if (index >= 0 && index < numCells) {
     Element* cell = children->item(index);
     HTMLElement::removeChild(cell, exceptionState);