Introduce isHTMLAnchorElement and toHTMLAnchorElement

Source/core/accessibility/AccessibilityNodeObject.cpp

Index: Source/core/accessibility/AccessibilityNodeObject.cpp
diff --git a/Source/core/accessibility/AccessibilityNodeObject.cpp b/Source/core/accessibility/AccessibilityNodeObject.cpp
index 5a19c00731087a4125aea8e594aa325ebcf7321b..5f5ba91c626143af94a7682236c33295c465a8ab 100644
--- a/Source/core/accessibility/AccessibilityNodeObject.cpp
+++ b/Source/core/accessibility/AccessibilityNodeObject.cpp
@@ -33,6 +33,7 @@
 #include "core/dom/NodeTraversal.h"
 #include "core/dom/Text.h"
 #include "core/dom/UserGestureIndicator.h"
+#include "core/html/HTMLAnchorElement.h"
 #include "core/html/HTMLFrameElementBase.h"
 #include "core/html/HTMLInputElement.h"
 #include "core/html/HTMLLabelElement.h"
@@ -1368,7 +1369,7 @@ Element* AccessibilityNodeObject::anchorElement() const
     // search up the DOM tree for an anchor element
     // NOTE: this assumes that any non-image with an anchor is an HTMLAnchorElement
     for ( ; node; node = node->parentNode()) {
-        if (node->hasTagName(aTag) || (node->renderer() && cache->getOrCreate(node->renderer())->isAnchor()))
+        if (isHTMLAnchorElement(node) || (node->renderer() && cache->getOrCreate(node->renderer())->isAnchor()))
             return toElement(node);
     }