Use stricter typing for NodeLists throughout the code base

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 5135db8177a3814c1eb37c38afe1708a9583129a..733da58b92b1553a76db15a8c889391cac7e8a26 100644
--- a/Source/core/html/HTMLTableElement.cpp
+++ b/Source/core/html/HTMLTableElement.cpp
@@ -40,7 +40,6 @@
 #include "core/html/HTMLTableCaptionElement.h"
 #include "core/html/HTMLTableCellElement.h"
 #include "core/html/HTMLTableRowElement.h"
-#include "core/html/HTMLTableRowsCollection.h"
 #include "core/html/HTMLTableSectionElement.h"
 #include "core/html/parser/HTMLParserIdioms.h"
 #include "core/rendering/RenderTable.h"
@@ -556,9 +555,9 @@ const QualifiedName& HTMLTableElement::subResourceAttributeName() const
     return backgroundAttr;
 }
 
-PassRefPtrWillBeRawPtr<HTMLCollection> HTMLTableElement::rows()
+PassRefPtrWillBeRawPtr<HTMLTableRowsCollection> HTMLTableElement::rows()
 {
-    return ensureCachedHTMLCollection(TableRows);
+    return toHTMLTableRowsCollection(ensureCachedHTMLCollection(TableRows).get());
 }
 
 PassRefPtrWillBeRawPtr<HTMLCollection> HTMLTableElement::tBodies()