Remove attributeCount() / attributeAt() API from Element

Source/core/dom/Element.h

Index: Source/core/dom/Element.h
diff --git a/Source/core/dom/Element.h b/Source/core/dom/Element.h
index 8a92a302ae83de24bfae0496f44ba511faaf6753..277e94e0c03428c0cbcca833db11b3da141e7e9e 100644
--- a/Source/core/dom/Element.h
+++ b/Source/core/dom/Element.h
@@ -171,9 +171,7 @@ public:
     // Internal methods that assume the existence of attribute storage, one should use hasAttributes()
     // before calling them. This is not a trivial getter and its return value should be cached for
     // performance.
-    AttributeCollection attributes() const { return elementData()->attributes(); }
-    size_t attributeCount() const;
-    const Attribute& attributeAt(unsigned index) const;
+    AttributeCollection attributes() const;
     const Attribute* findAttributeByName(const QualifiedName&) const;
     size_t findAttributeIndexByName(const QualifiedName& name) const { return elementData()->attributes().findIndex(name); }
     size_t findAttributeIndexByName(const AtomicString& name, bool shouldIgnoreAttributeCase) const { return elementData()->attributes().findIndex(name, shouldIgnoreAttributeCase); }
@@ -713,6 +711,12 @@ inline const AtomicString& Element::fastGetAttribute(const QualifiedName& name)
     return nullAtom;
 }
 
+inline AttributeCollection Element::attributes() const
+{
+    ASSERT(elementData());
+    return elementData()->attributes();
+}
+
 inline bool Element::hasAttributesWithoutUpdate() const
 {
     return elementData() && !elementData()->attributes().isEmpty();
@@ -764,18 +768,6 @@ inline const SpaceSplitString& Element::classNames() const
     return elementData()->classNames();
 }
 
-inline size_t Element::attributeCount() const
-{
-    ASSERT(elementData());
-    return elementData()->attributes().size();
-}
-
-inline const Attribute& Element::attributeAt(unsigned index) const
-{
-    ASSERT(elementData());
-    return elementData()->attributes()[index];
-}
-
 inline const Attribute* Element::findAttributeByName(const QualifiedName& name) const
 {
     ASSERT(elementData());