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

Source/core/page/Chrome.cpp

Index: Source/core/page/Chrome.cpp
diff --git a/Source/core/page/Chrome.cpp b/Source/core/page/Chrome.cpp
index 873ab3b768fac7a0cfb182e30f329c1f75f0424b..980cbbc232a1166d90099899b751e5815ab7e3cb 100644
--- a/Source/core/page/Chrome.cpp
+++ b/Source/core/page/Chrome.cpp
@@ -283,7 +283,7 @@ void Chrome::setToolTip(const HitTestResult& result)
     // Lastly, for <input type="file"> that allow multiple files, we'll consider a tooltip for the selected filenames
     if (toolTip.isEmpty()) {
         if (Node* node = result.innerNonSharedNode()) {
-            if (node->hasTagName(inputTag)) {
+            if (isHTMLInputElement(*node)) {
                 HTMLInputElement* input = toHTMLInputElement(node);
                 toolTip = input->defaultToolTip();