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

Source/core/frame/FrameView.cpp

 /*
  * Copyright (C) 1998, 1999 Torben Weis <weis@kde.org>
  *                     1999 Lars Knoll <knoll@kde.org>
  *                     1999 Antti Koivisto <koivisto@kde.org>
  *                     2000 Dirk Mueller <mueller@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
  *           (C) 2006 Graham Dennis (graham.dennis@gmail.com)
  *           (C) 2006 Alexey Proskuryakov (ap@nypop.com)
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
@@ skipping 257 matching lines @@
 }
 
 void FrameView::init()
 {
     reset();
 
     m_size = LayoutSize();
 
     // Propagate the marginwidth/height and scrolling modes to the view.
     Element* ownerElement = m_frame->ownerElement();
-    if (ownerElement && (ownerElement->hasTagName(frameTag) || ownerElement->hasTagName(iframeTag))) {
+    if (ownerElement && (isHTMLFrameElement(*ownerElement) || isHTMLIFrameElement(*ownerElement))) {
         HTMLFrameElementBase* frameElt = toHTMLFrameElementBase(ownerElement);
         if (frameElt->scrollingMode() == ScrollbarAlwaysOff)
             setCanHaveScrollbars(false);
     }
 }
 
 void FrameView::prepareForDetach()
 {
     RELEASE_ASSERT(!isInPerformLayout());
 
@@ skipping 298 matching lines @@
         hMode = ScrollbarAuto;
         vMode = ScrollbarAuto;
     } else {
         hMode = ScrollbarAlwaysOff;
         vMode = ScrollbarAlwaysOff;
     }
 
     if (!isSubtreeLayout()) {
         Document* document = m_frame->document();
         Node* body = document->body();
-        if (body && body->renderer() && body->hasTagName(framesetTag)) {
+        if (isHTMLFrameSetElement(body) && body->renderer()) {
             vMode = ScrollbarAlwaysOff;
             hMode = ScrollbarAlwaysOff;
         } else if (Element* viewportElement = document->viewportDefiningElement()) {
             if (RenderObject* viewportRenderer = viewportElement->renderer()) {
                 if (viewportRenderer->style())
                     applyOverflowToViewportAndSetRenderer(viewportRenderer, hMode, vMode);
             }
         }
     }
 }
@@ skipping 288 matching lines @@
     FontCachePurgePreventer fontCachePurgePreventer;
     RenderLayer* layer;
     {
         TemporaryChange<bool> changeSchedulingEnabled(m_layoutSchedulingEnabled, false);
 
         m_nestedLayoutCount++;
         if (!inSubtreeLayout) {
             Document* document = m_frame->document();
             Node* body = document->body();
             if (body && body->renderer()) {
-                if (body->hasTagName(framesetTag)) {
+                if (isHTMLFrameSetElement(*body)) {
                     body->renderer()->setChildNeedsLayout();
-                } else if (body->hasTagName(bodyTag)) {
+                } else if (isHTMLBodyElement(*body)) {
                     if (!m_firstLayout && m_size.height() != layoutSize().height() && body->renderer()->enclosingBox()->stretchesToViewport())
                         body->renderer()->setChildNeedsLayout();
                 }
             }
         }
         updateCounters();
         autoSizeIfEnabled();
 
         ScrollbarMode hMode;
         ScrollbarMode vMode;
@@ skipping 261 matching lines @@
 
     for (size_t i = 0; i < widgets.size() && renderView(); ++i)
         widgets[i]->widgetPositionsUpdated();
 }
 
 void FrameView::addWidgetToUpdate(RenderEmbeddedObject& object)
 {
     ASSERT(isInPerformLayout());
     // Tell the DOM element that it needs a widget update.
     Node* node = object.node();
-    if (node->hasTagName(objectTag) || node->hasTagName(embedTag))
+    ASSERT(node);
+    if (isHTMLObjectElement(*node) || isHTMLEmbedElement(*node))
         toHTMLPlugInElement(node)->setNeedsWidgetUpdate(true);
 
     m_widgetUpdateSet.add(&object);
 }
 
 void FrameView::setMediaType(const AtomicString& mediaType)
 {
     ASSERT(m_frame->document());
     m_frame->document()->mediaQueryAffectingValueChanged();
     m_mediaType = mediaType;
@@ skipping 2012 matching lines @@
 void FrameView::willRemoveScrollbar(Scrollbar* scrollbar, ScrollbarOrientation orientation)
 {
     ScrollableArea::willRemoveScrollbar(scrollbar, orientation);
     if (AXObjectCache* cache = axObjectCache()) {
         cache->remove(scrollbar);
         cache->handleScrollbarUpdate(this);
     }
 }
 
 } // namespace WebCore