Remove always-false null checks for getElementsByTagName(NS)

third_party/WebKit/Source/core/dom/ContainerNode.cpp

Index: third_party/WebKit/Source/core/dom/ContainerNode.cpp
diff --git a/third_party/WebKit/Source/core/dom/ContainerNode.cpp b/third_party/WebKit/Source/core/dom/ContainerNode.cpp
index 2ee1257276b57493dbe2713a342f4d9e6fd0b660..d9edc6db0fe24d1cb2055611e9a6d1e2a0799809 100644
--- a/third_party/WebKit/Source/core/dom/ContainerNode.cpp
+++ b/third_party/WebKit/Source/core/dom/ContainerNode.cpp
@@ -1465,9 +1465,6 @@ void ContainerNode::invalidateNodeListCachesInAncestors(const QualifiedName* att
 
 PassRefPtrWillBeRawPtr<TagCollection> ContainerNode::getElementsByTagName(const AtomicString& localName)
 {
-    if (localName.isNull())
-        return nullptr;
-
     if (document().isHTMLDocument())
         return ensureCachedCollection<HTMLTagCollection>(HTMLTagCollectionType, localName);
     return ensureCachedCollection<TagCollection>(TagCollectionType, localName);
@@ -1475,9 +1472,6 @@ PassRefPtrWillBeRawPtr<TagCollection> ContainerNode::getElementsByTagName(const
 
 PassRefPtrWillBeRawPtr<TagCollection> ContainerNode::getElementsByTagNameNS(const AtomicString& namespaceURI, const AtomicString& localName)
 {
-    if (localName.isNull())
-        return nullptr;
-
     if (namespaceURI == starAtom)
         return getElementsByTagName(localName);