Use new is*Element() helper functions in DOM code

Source/core/dom/StyleEngine.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2008, 2009, 2011, 2012 Google Inc. All rights reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) Research In Motion Limited 2010-2011. All rights reserved.
@@ skipping 226 matching lines @@
 }
 
 void StyleEngine::addPendingSheet()
 {
     master()->styleEngine()->notifyPendingStyleSheetAdded();
 }
 
 // This method is called whenever a top-level stylesheet has finished loading.
 void StyleEngine::removePendingSheet(Node* styleSheetCandidateNode, RemovePendingSheetNotificationType notification)
 {
-    TreeScope* treeScope = styleSheetCandidateNode->hasTagName(styleTag) ? &styleSheetCandidateNode->treeScope() : &m_document;
+    ASSERT(styleSheetCandidateNode);
+    TreeScope* treeScope = isHTMLStyleElement(*styleSheetCandidateNode) ? &styleSheetCandidateNode->treeScope() : &m_document;
     markTreeScopeDirty(*treeScope);
     master()->styleEngine()->notifyPendingStyleSheetRemoved(notification);
 }
 
 void StyleEngine::notifyPendingStyleSheetAdded()
 {
     ASSERT(isMaster());
     m_pendingStylesheets++;
 }
 
@@ skipping 19 matching lines @@
 
 void StyleEngine::modifiedStyleSheet(StyleSheet* sheet)
 {
     if (!sheet)
         return;
 
     Node* node = sheet->ownerNode();
     if (!node || !node->inDocument())
         return;
 
-    TreeScope& treeScope = node->hasTagName(styleTag) ? node->treeScope() : m_document;
-    ASSERT(node->hasTagName(styleTag) || treeScope == m_document);
+    TreeScope& treeScope = isHTMLStyleElement(*node) ? node->treeScope() : m_document;
+    ASSERT(isHTMLStyleElement(node) || treeScope == m_document);
 
     markTreeScopeDirty(treeScope);
 }
 
 void StyleEngine::addStyleSheetCandidateNode(Node* node, bool createdByParser)
 {
     if (!node->inDocument())
         return;
 
-    TreeScope& treeScope = node->hasTagName(styleTag) ? node->treeScope() : m_document;
-    ASSERT(node->hasTagName(styleTag) || treeScope == m_document);
+    TreeScope& treeScope = isHTMLStyleElement(*node) ? node->treeScope() : m_document;
+    ASSERT(isHTMLStyleElement(node) || treeScope == m_document);
 
     TreeScopeStyleSheetCollection* collection = ensureStyleSheetCollectionFor(treeScope);
     ASSERT(collection);
     collection->addStyleSheetCandidateNode(node, createdByParser);
 
     markTreeScopeDirty(treeScope);
     if (treeScope != m_document)
         insertTreeScopeInDocumentOrder(m_activeTreeScopes, &treeScope);
 }
 
 void StyleEngine::removeStyleSheetCandidateNode(Node* node, ContainerNode* scopingNode)
 {
     TreeScope& treeScope = scopingNode ? scopingNode->treeScope() : m_document;
-    ASSERT(node->hasTagName(styleTag) || treeScope == m_document);
+    ASSERT(isHTMLStyleElement(node) || treeScope == m_document);
 
     TreeScopeStyleSheetCollection* collection = styleSheetCollectionFor(treeScope);
     ASSERT(collection);
     collection->removeStyleSheetCandidateNode(node, scopingNode);
 
     markTreeScopeDirty(treeScope);
     m_activeTreeScopes.remove(&treeScope);
 }
 
 void StyleEngine::modifiedStyleSheetCandidateNode(Node* node)
 {
     if (!node->inDocument())
         return;
 
-    TreeScope& treeScope = node->hasTagName(styleTag) ? node->treeScope() : m_document;
-    ASSERT(node->hasTagName(styleTag) || treeScope == m_document);
+    TreeScope& treeScope = isHTMLStyleElement(*node) ? node->treeScope() : m_document;
+    ASSERT(isHTMLStyleElement(node) || treeScope == m_document);
     markTreeScopeDirty(treeScope);
 }
 
 bool StyleEngine::shouldUpdateShadowTreeStyleSheetCollection(StyleResolverUpdateMode updateMode)
 {
     return !m_dirtyTreeScopes.isEmpty() || updateMode == FullStyleUpdate;
 }
 
 void StyleEngine::clearMediaQueryRuleSetOnTreeScopeStyleSheets(TreeScopeSet treeScopes)
 {
@@ skipping 272 matching lines @@
 {
     HashMap<StyleSheetContents*, AtomicString>::iterator it = sheetToTextCache().find(contents);
     if (it == sheetToTextCache().end())
         return;
 
     textToSheetCache().remove(it->value);
     sheetToTextCache().remove(contents);
 }
 
 }