Have getElementsByClassName() / getElementsByTagName*() return an HTMLCollection

public/web/WebNodeList.h

Index: public/web/WebNodeList.h
diff --git a/public/web/WebNodeList.h b/public/web/WebNodeList.h
index 80484366318afa51219c17f7301e4ea0f0b28f31..14271f65340a175ca8ef04a36170a63ca8e8b546 100644
--- a/public/web/WebNodeList.h
+++ b/public/web/WebNodeList.h
@@ -32,6 +32,7 @@
 #define WebNodeList_h
 
 #include "../platform/WebCommon.h"
+#include "WebNodeCollection.h"
 
 namespace WebCore { class NodeList; }
 #if BLINK_IMPLEMENTATION
@@ -54,6 +55,10 @@ public:
         return *this;
     }
 
+    // FIXME(crbug.com/235008): Remove once chromium has been updated to stop using
+    // WebCollection as a WebNodeList.
+    BLINK_EXPORT WebNodeList(const WebNodeCollection&);
+
     BLINK_EXPORT void reset();
     BLINK_EXPORT void assign(const WebNodeList&);