Use new is*Element() helper functions in page/ code

Source/core/page/TouchDisambiguation.cpp

Index: Source/core/page/TouchDisambiguation.cpp
diff --git a/Source/core/page/TouchDisambiguation.cpp b/Source/core/page/TouchDisambiguation.cpp
index 38a59fd584850a4c8a2bacebd343d47f15123913..56ff16c2113a30543f1caee506fc2323c58731f3 100644
--- a/Source/core/page/TouchDisambiguation.cpp
+++ b/Source/core/page/TouchDisambiguation.cpp
@@ -40,6 +40,7 @@
 #include "core/dom/NodeTraversal.h"
 #include "core/frame/FrameView.h"
 #include "core/frame/LocalFrame.h"
+#include "core/html/HTMLHtmlElement.h"
 #include "core/page/EventHandler.h"
 #include "core/rendering/HitTestResult.h"
 #include "core/rendering/RenderBlock.h"
@@ -125,7 +126,7 @@ void findGoodTouchTargets(const IntRect& touchBox, LocalFrame* mainFrame, Vector
         for (Node* node = it->get(); node; node = node->parentNode()) {
             if (blackList.contains(node))
                 continue;
-            if (node->isDocumentNode() || node->hasTagName(HTMLNames::htmlTag) || node->hasTagName(HTMLNames::bodyTag))
+            if (node->isDocumentNode() || isHTMLHtmlElement(*node) || isHTMLBodyElement(*node))
                 break;
             if (node->willRespondToMouseClickEvents()) {
                 TouchTargetData& targetData = touchTargets.add(node, TouchTargetData()).storedValue->value;