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

Source/core/page/SpatialNavigation.cpp

 /*
  * Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) 2009 Antonio Gomes <tonikitoo@webkit.org>
  *
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
@@ skipping 50 matching lines @@
     , distance(maxDistance())
     , parentDistance(maxDistance())
     , alignment(None)
     , parentAlignment(None)
     , isOffscreen(true)
     , isOffscreenAfterScrolling(true)
 {
     ASSERT(node);
     ASSERT(node->isElementNode());
 
-    if (node->hasTagName(areaTag)) {
-        HTMLAreaElement* area = toHTMLAreaElement(node);
-        HTMLImageElement* image = area->imageElement();
+    if (isHTMLAreaElement(*node)) {
+        HTMLAreaElement& area = toHTMLAreaElement(*node);
+        HTMLImageElement* image = area.imageElement();
         if (!image || !image->renderer())
             return;
 
         visibleNode = image;
         rect = virtualRectForAreaElementAndDirection(area, type);
     } else {
         if (!node->renderer())
             return;
 
         visibleNode = node;
@@ skipping 514 matching lines @@
 {
     if (firstCandidate.isNull() || secondCandidate.isNull())
         return false;
 
     if (!firstCandidate.visibleNode->renderer() || !secondCandidate.visibleNode->renderer())
         return false;
 
     if (!firstCandidate.rect.intersects(secondCandidate.rect))
         return false;
 
-    if (firstCandidate.focusableNode->hasTagName(areaTag) || secondCandidate.focusableNode->hasTagName(areaTag))
+    if (isHTMLAreaElement(*firstCandidate.focusableNode) || isHTMLAreaElement(*secondCandidate.focusableNode))
         return false;
 
     if (!firstCandidate.visibleNode->renderer()->isRenderInline() || !secondCandidate.visibleNode->renderer()->isRenderInline())
         return false;
 
     if (firstCandidate.visibleNode->renderer()->containingBlock() != secondCandidate.visibleNode->renderer()->containingBlock())
         return false;
 
     return true;
 }
@@ skipping 96 matching lines @@
     case FocusTypeDown:
         virtualStartingRect.setHeight(width);
         break;
     default:
         ASSERT_NOT_REACHED();
     }
 
     return virtualStartingRect;
 }
 
-LayoutRect virtualRectForAreaElementAndDirection(HTMLAreaElement* area, FocusType type)
+LayoutRect virtualRectForAreaElementAndDirection(HTMLAreaElement& area, FocusType type)
 {
-    ASSERT(area);
-    ASSERT(area->imageElement());
+    ASSERT(area.imageElement());
     // Area elements tend to overlap more than other focusable elements. We flatten the rect of the area elements
     // to minimize the effect of overlapping areas.
-    LayoutRect rect = virtualRectForDirection(type, rectToAbsoluteCoordinates(area->document().frame(), area->computeRect(area->imageElement()->renderer())), 1);
+    LayoutRect rect = virtualRectForDirection(type, rectToAbsoluteCoordinates(area.document().frame(), area.computeRect(area.imageElement()->renderer())), 1);
     return rect;
 }
 
 HTMLFrameOwnerElement* frameOwnerElement(FocusCandidate& candidate)
 {
     return candidate.isFrameOwnerElement() ? toHTMLFrameOwnerElement(candidate.visibleNode) : 0;
 };
 
 } // namespace WebCore