Use stricter typing for NodeLists throughout the code base

Source/core/fetch/FontResource.cpp

Index: Source/core/fetch/FontResource.cpp
diff --git a/Source/core/fetch/FontResource.cpp b/Source/core/fetch/FontResource.cpp
index 807888013cbedc3df2ea014a1f40e07829582e55..22df8287e6c165e3061f981429fe32d1d6a2f1f4 100644
--- a/Source/core/fetch/FontResource.cpp
+++ b/Source/core/fetch/FontResource.cpp
@@ -27,6 +27,7 @@
 #include "config.h"
 #include "core/fetch/FontResource.h"
 
+#include "core/dom/TagCollection.h"
 #include "core/fetch/ResourceClientWalker.h"
 #include "core/html/parser/TextResourceDecoder.h"
 #include "platform/SharedBuffer.h"
@@ -168,7 +169,7 @@ bool FontResource::ensureSVGFontData()
 
 SVGFontElement* FontResource::getSVGFontById(const String& fontName) const
 {
-    RefPtrWillBeRawPtr<HTMLCollection> collection = m_externalSVGDocument->getElementsByTagNameNS(SVGNames::fontTag.namespaceURI(), SVGNames::fontTag.localName());
+    RefPtrWillBeRawPtr<TagCollection> collection = m_externalSVGDocument->getElementsByTagNameNS(SVGNames::fontTag.namespaceURI(), SVGNames::fontTag.localName());
     if (!collection)
         return 0;