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

Source/web/WebPasswordFormUtils.cpp

 /* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
@@ skipping 51 matching lines @@
 
     HTMLInputElement* latestInputElement = 0;
     const Vector<FormAssociatedElement*>& formElements = form->associatedElements();
     for (size_t i = 0; i < formElements.size(); i++) {
         if (!formElements[i]->isFormControlElement())
             continue;
         HTMLFormControlElement* control = toHTMLFormControlElement(formElements[i]);
         if (control->isActivatedSubmit())
             fields->submit = control;
 
-        if (!control->hasTagName(HTMLNames::inputTag))
+        if (!isHTMLInputElement(*control))
             continue;
 
-        HTMLInputElement* inputElement = toHTMLInputElement(control);
-        if (inputElement->isDisabledFormControl())
+        HTMLInputElement& inputElement = toHTMLInputElement(*control);
+        if (inputElement.isDisabledFormControl())
             continue;
 
         if ((fields->passwords.size() < maxPasswords)
-            && inputElement->isPasswordField()) {
+            && inputElement.isPasswordField()) {
             // We assume that the username is the input element before the
             // first password element.
             if (fields->passwords.isEmpty() && latestInputElement) {
                 fields->userName = latestInputElement;
                 // Remove the selected username from alternateUserNames.
                 if (!fields->alternateUserNames.isEmpty() && !latestInputElement->value().isEmpty())
                     fields->alternateUserNames.removeLast();
             }
-            fields->passwords.append(inputElement);
+            fields->passwords.append(&inputElement);
         }
 
         // Various input types such as text, url, email can be a username field.
-        if (inputElement->isTextField() && !inputElement->isPasswordField()) {
-            latestInputElement = inputElement;
+        if (inputElement.isTextField() && !inputElement.isPasswordField()) {
+            latestInputElement = &inputElement;
             // We ignore elements that have no value. Unlike userName, alternateUserNames
             // is used only for autofill, not for form identification, and blank autofill
             // entries are not useful.
-            if (!inputElement->value().isEmpty())
-                fields->alternateUserNames.append(inputElement->value());
+            if (!inputElement.value().isEmpty())
+                fields->alternateUserNames.append(inputElement.value());
         }
     }
 }
 
 } // namespace blink