getElementsByTagName() should take a qualifiedName in parameter

third_party/WebKit/Source/core/dom/AllDescendantsCollection.h

+// Copyright 2017 The Chromium Authors. All rights reserved.

[tkent, 2017/05/09 00:28:01]

If you copied the code from the WebKit patch, you should not change the
copyright notice.

+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef AllDescendantsCollection_h
+#define AllDescendantsCollection_h
+
+#include "core/html/HTMLCollection.h"
+
+namespace blink {
+
+class AllDescendantsCollection : public HTMLCollection {
+ public:
+  static AllDescendantsCollection* Create(ContainerNode& root_node,
+                                          CollectionType type) {
+    DCHECK_EQ(type, kAllDescendantsCollectionType);
+    return new AllDescendantsCollection(root_node,
+                                        kAllDescendantsCollectionType);
+  }
+
+  bool ElementMatches(const Element&) const { return true; }
+
+ protected:

[tkent, 2017/05/09 00:28:01]

should be private?

+  AllDescendantsCollection(ContainerNode& root_node, CollectionType type)
+      : HTMLCollection(root_node, type, kDoesNotOverrideItemAfter) {}
+};
+
+DEFINE_TYPE_CASTS(AllDescendantsCollection,
+                  LiveNodeListBase,
+                  collection,
+                  collection->GetType() == kAllDescendantsCollectionType,
+                  collection.GetType() == kAllDescendantsCollectionType);
+
+}  // namespace blink
+
+#endif  // AllDescendantsCollection_h