Introduce toHTMLSelectElement and remove isHTMLSelectElement

Source/core/html/HTMLSelectElement.h

Index: Source/core/html/HTMLSelectElement.h
diff --git a/Source/core/html/HTMLSelectElement.h b/Source/core/html/HTMLSelectElement.h
index 65ab1d5a5dac86f4f931ae260e7a40283b60270b..bcfed462d59572ddbb782630656483eeee1a47ba 100644
--- a/Source/core/html/HTMLSelectElement.h
+++ b/Source/core/html/HTMLSelectElement.h
@@ -206,23 +206,12 @@ private:
     bool m_isParsingInProgress;
 };
 
-inline bool isHTMLSelectElement(const Node* node)
-{
-    return node->hasTagName(HTMLNames::selectTag);
-}
-
 inline HTMLSelectElement* toHTMLSelectElement(Node* node)
 {
-    ASSERT_WITH_SECURITY_IMPLICATION(!node || isHTMLSelectElement(node));
+    ASSERT_WITH_SECURITY_IMPLICATION(!node || node->hasTagName(HTMLNames::selectTag));
     return static_cast<HTMLSelectElement*>(node);
 }
 
-inline const HTMLSelectElement* toHTMLSelectElement(const Node* node)
-{
-    ASSERT_WITH_SECURITY_IMPLICATION(!node || isHTMLSelectElement(node));
-    return static_cast<const HTMLSelectElement*>(node);
-}
-
 void toHTMLSelectElement(const HTMLSelectElement*); // This overload will catch anyone doing an unnecessary cast.
 
 } // namespace