Use new is*Element() helper functions further more in HTML code

Source/core/html/HTMLTextFormControlElement.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007 Apple Inc. All rights reserved.
  *           (C) 2006 Alexey Proskuryakov (ap@nypop.com)
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
@@ skipping 424 matching lines @@
         return nullptr;
 
     if (!innerText->firstChild())
         return Range::create(document(), innerText, 0, innerText, 0);
 
     int offset = 0;
     Node* startNode = 0;
     Node* endNode = 0;
     for (Node* node = innerText->firstChild(); node; node = NodeTraversal::next(*node, innerText)) {
         ASSERT(!node->firstChild());
-        ASSERT(node->isTextNode() || node->hasTagName(brTag));
+        ASSERT(node->isTextNode() || isHTMLBRElement(*node));
         int length = node->isTextNode() ? lastOffsetInNode(node) : 1;
 
         if (offset <= start && start <= offset + length)
             setContainerAndOffsetForRange(node, start - offset, startNode, start);
 
         if (offset <= end && end <= offset + length) {
             setContainerAndOffsetForRange(node, end - offset, endNode, end);
             break;
         }
 
@@ skipping 73 matching lines @@
 
 String HTMLTextFormControlElement::innerTextValue() const
 {
     ASSERT(!hasAuthorShadowRoot());
     HTMLElement* innerText = innerTextElement();
     if (!innerText || !isTextFormControl())
         return emptyString();
 
     StringBuilder result;
     for (Node* node = innerText; node; node = NodeTraversal::next(*node, innerText)) {
-        if (node->hasTagName(brTag))
+        if (isHTMLBRElement(*node))
             result.append(newlineCharacter);
         else if (node->isTextNode())
             result.append(toText(node)->data());
     }
     return finishText(result);
 }
 
 static void getNextSoftBreak(RootInlineBox*& line, Node*& breakNode, unsigned& breakOffset)
 {
     RootInlineBox* next;
@@ skipping 26 matching lines @@
     Node* breakNode;
     unsigned breakOffset;
     RootInlineBox* line = renderer->firstRootBox();
     if (!line)
         return value();
 
     getNextSoftBreak(line, breakNode, breakOffset);
 
     StringBuilder result;
     for (Node* node = innerText->firstChild(); node; node = NodeTraversal::next(*node, innerText)) {
-        if (node->hasTagName(brTag))
+        if (isHTMLBRElement(*node))
             result.append(newlineCharacter);
         else if (node->isTextNode()) {
             String data = toText(node)->data();
             unsigned length = data.length();
             unsigned position = 0;
             while (breakNode == node && breakOffset <= length) {
                 if (breakOffset > position) {
                     result.append(data, position, breakOffset - position);
                     position = breakOffset;
                     result.append(newlineCharacter);
@@ skipping 50 matching lines @@
 
     return "ltr";
 }
 
 HTMLElement* HTMLTextFormControlElement::innerTextElement() const
 {
     return toHTMLElement(userAgentShadowRoot()->getElementById(ShadowElementNames::innerEditor()));
 }
 
 } // namespace Webcore