Removing border attribute should remove the visual border

Source/core/html/HTMLElement.cpp

Index: Source/core/html/HTMLElement.cpp
diff --git a/Source/core/html/HTMLElement.cpp b/Source/core/html/HTMLElement.cpp
index 5ab64fcbaada007cbea96431797b715ff08501b6..ca8bde5bf5f1102766ce8db7d2f9dec8d838a175 100644
--- a/Source/core/html/HTMLElement.cpp
+++ b/Source/core/html/HTMLElement.cpp
@@ -127,8 +127,10 @@ static inline CSSValueID unicodeBidiAttributeForDirAuto(HTMLElement* element)
 unsigned HTMLElement::parseBorderWidthAttribute(const AtomicString& value) const
 {
     unsigned borderWidth = 0;
-    if (value.isEmpty() || !parseHTMLNonNegativeInteger(value, borderWidth))
-        return hasTagName(tableTag) ? 1 : borderWidth;
+    if (value.isEmpty() || !parseHTMLNonNegativeInteger(value, borderWidth)) {
+        if (hasTagName(tableTag) && !value.isNull())
+            return 1;
+    }
     return borderWidth;
 }