DOM: Fix a getElementsByTagName regression by r454059.

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

Index: third_party/WebKit/Source/core/html/HTMLTagCollection.cpp
diff --git a/third_party/WebKit/Source/core/html/HTMLTagCollection.cpp b/third_party/WebKit/Source/core/html/HTMLTagCollection.cpp
index 94c570d8f8f5447ceab5ea6b53585de12af8ea6d..6496b102b30930a019ccbfda923a2f5a6a7e3a9a 100644
--- a/third_party/WebKit/Source/core/html/HTMLTagCollection.cpp
+++ b/third_party/WebKit/Source/core/html/HTMLTagCollection.cpp
@@ -22,14 +22,14 @@
  * Boston, MA 02110-1301, USA.
  */
 
-#include "HTMLTagCollection.h"
+#include "core/html/HTMLTagCollection.h"
 
 namespace blink {
 
 HTMLTagCollection::HTMLTagCollection(ContainerNode& rootNode,
                                      const AtomicString& localName)
     : TagCollection(rootNode, HTMLTagCollectionType, starAtom, localName),
-      m_loweredLocalName(localName.lower()) {
+      m_loweredLocalName(localName.lowerASCII()) {
   DCHECK(rootNode.document().isHTMLDocument());
 }