Use Traversal<>::firstChild() instead of firstWithin() when iterating over children

Source/core/html/HTMLTableElement.cpp

Index: Source/core/html/HTMLTableElement.cpp
diff --git a/Source/core/html/HTMLTableElement.cpp b/Source/core/html/HTMLTableElement.cpp
index 95be5d366aa6919bd427f62b776c0234961dd5f6..0ae3932b783e69104ba30ab0d60f2ea0a659b9cf 100644
--- a/Source/core/html/HTMLTableElement.cpp
+++ b/Source/core/html/HTMLTableElement.cpp
@@ -77,7 +77,7 @@ void HTMLTableElement::setCaption(PassRefPtrWillBeRawPtr<HTMLTableCaptionElement
 
 HTMLTableSectionElement* HTMLTableElement::tHead() const
 {
-    for (HTMLElement* child = Traversal<HTMLElement>::firstWithin(*this); child; child = Traversal<HTMLElement>::nextSibling(*child)) {
+    for (HTMLElement* child = Traversal<HTMLElement>::firstChild(*this); child; child = Traversal<HTMLElement>::nextSibling(*child)) {
         if (child->hasTagName(theadTag))
             return toHTMLTableSectionElement(child);
     }
@@ -89,7 +89,7 @@ void HTMLTableElement::setTHead(PassRefPtrWillBeRawPtr<HTMLTableSectionElement>
     deleteTHead();
 
     HTMLElement* child;
-    for (child = Traversal<HTMLElement>::firstWithin(*this); child; child = Traversal<HTMLElement>::nextSibling(*child)) {
+    for (child = Traversal<HTMLElement>::firstChild(*this); child; child = Traversal<HTMLElement>::nextSibling(*child)) {
         if (!child->hasTagName(captionTag) && !child->hasTagName(colgroupTag))
             break;
     }
@@ -99,7 +99,7 @@ void HTMLTableElement::setTHead(PassRefPtrWillBeRawPtr<HTMLTableSectionElement>
 
 HTMLTableSectionElement* HTMLTableElement::tFoot() const
 {
-    for (HTMLElement* child = Traversal<HTMLElement>::firstWithin(*this); child; child = Traversal<HTMLElement>::nextSibling(*child)) {
+    for (HTMLElement* child = Traversal<HTMLElement>::firstChild(*this); child; child = Traversal<HTMLElement>::nextSibling(*child)) {
         if (child->hasTagName(tfootTag))
             return toHTMLTableSectionElement(child);
     }
@@ -111,7 +111,7 @@ void HTMLTableElement::setTFoot(PassRefPtrWillBeRawPtr<HTMLTableSectionElement>
     deleteTFoot();
 
     HTMLElement* child;
-    for (child = Traversal<HTMLElement>::firstWithin(*this); child; child = Traversal<HTMLElement>::nextSibling(*child)) {
+    for (child = Traversal<HTMLElement>::firstChild(*this); child; child = Traversal<HTMLElement>::nextSibling(*child)) {
         if (!child->hasTagName(captionTag) && !child->hasTagName(colgroupTag) && !child->hasTagName(theadTag))
             break;
     }