Return reference from styleEngine() accessor.

Source/core/dom/StyleElement.cpp

 /*
  * Copyright (C) 2006, 2007 Rob Buis
  * Copyright (C) 2008 Apple, Inc. All rights reserved.
  *
  * 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
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 50 matching lines @@
 #endif
 }
 
 void StyleElement::processStyleSheet(Document& document, Element* element)
 {
     TRACE_EVENT0("blink", "StyleElement::processStyleSheet");
     ASSERT(element);
     ASSERT(element->inDocument());
 
     m_registeredAsCandidate = true;
-    document.styleEngine()->addStyleSheetCandidateNode(element, m_createdByParser);
+    document.styleEngine().addStyleSheetCandidateNode(element, m_createdByParser);
     if (m_createdByParser)
         return;
 
     process(element);
 }
 
 void StyleElement::insertedInto(Element* element, ContainerNode* insertionPoint)
 {
     if (!insertionPoint->inDocument() || !element->isInShadowTree())
         return;
     if (ShadowRoot* scope = element->containingShadowRoot())
         scope->registerScopedHTMLStyleChild();
 }
 
 void StyleElement::removedFrom(Element* element, ContainerNode* insertionPoint)
 {
     if (!insertionPoint->inDocument())
         return;
 
     ShadowRoot* shadowRoot = element->containingShadowRoot();
     if (!shadowRoot)
         shadowRoot = insertionPoint->containingShadowRoot();
 
     if (shadowRoot)
         shadowRoot->unregisterScopedHTMLStyleChild();
 
     Document& document = element->document();
     if (m_registeredAsCandidate) {
-        document.styleEngine()->removeStyleSheetCandidateNode(element, shadowRoot ? *toTreeScope(shadowRoot) : toTreeScope(document));
+        document.styleEngine().removeStyleSheetCandidateNode(element, shadowRoot ? *toTreeScope(shadowRoot) : toTreeScope(document));
         m_registeredAsCandidate = false;
     }
 
     RefPtrWillBeRawPtr<StyleSheet> removedSheet = m_sheet.get();
 
     if (m_sheet)
         clearSheet(element);
     if (removedSheet)
         document.removedStyleSheet(removedSheet.get(), AnalyzedStyleUpdate);
 }
 
 void StyleElement::clearDocumentData(Document& document, Element* element)
 {
     if (m_sheet)
         m_sheet->clearOwnerNode();
 
     if (element->inDocument()) {
         // HTMLLinkElement in shadow tree is not supported.
         TreeScope& treeScope = isHTMLStyleElement(element) || isSVGStyleElement(element) ? element->treeScope() : element->document();
-        document.styleEngine()->removeStyleSheetCandidateNode(element, treeScope);
+        document.styleEngine().removeStyleSheetCandidateNode(element, treeScope);
     }
 }
 
 void StyleElement::childrenChanged(Element* element)
 {
     ASSERT(element);
     if (m_createdByParser)
         return;
 
     process(element);
@@ skipping 11 matching lines @@
     if (!element || !element->inDocument())
         return;
     createSheet(element, element->textFromChildren());
 }
 
 void StyleElement::clearSheet(Element* ownerElement)
 {
     ASSERT(m_sheet);
 
     if (ownerElement && m_sheet->isLoading())
-        ownerElement->document().styleEngine()->removePendingSheet(ownerElement);
+        ownerElement->document().styleEngine().removePendingSheet(ownerElement);
 
     m_sheet.release()->clearOwnerNode();
 }
 
 static bool shouldBypassMainWorldCSP(Element* element)
 {
     // Main world CSP is bypassed within an isolated world.
     LocalFrame* frame = element->document().frame();
     if (frame && frame->script().shouldBypassMainWorldCSP())
         return true;
@@ skipping 23 matching lines @@
     // If type is empty or CSS, this is a CSS style sheet.
     const AtomicString& type = this->type();
     if (isCSS(e, type) && passesContentSecurityPolicyChecks) {
         RefPtrWillBeRawPtr<MediaQuerySet> mediaQueries = MediaQuerySet::create(media());
 
         MediaQueryEvaluator screenEval("screen", true);
         MediaQueryEvaluator printEval("print", true);
         if (screenEval.eval(mediaQueries.get()) || printEval.eval(mediaQueries.get())) {
             m_loading = true;
             TextPosition startPosition = m_startPosition == TextPosition::belowRangePosition() ? TextPosition::minimumPosition() : m_startPosition;
-            m_sheet = document.styleEngine()->createSheet(e, text, startPosition, m_createdByParser);
+            m_sheet = document.styleEngine().createSheet(e, text, startPosition, m_createdByParser);
             m_sheet->setMediaQueries(mediaQueries.release());
             m_loading = false;
         }
     }
 
     if (m_sheet)
         m_sheet->contents()->checkLoaded();
 }
 
 bool StyleElement::isLoading() const
 {
     if (m_loading)
         return true;
     return m_sheet ? m_sheet->isLoading() : false;
 }
 
 bool StyleElement::sheetLoaded(Document& document)
 {
     if (isLoading())
         return false;
 
-    document.styleEngine()->removePendingSheet(m_sheet->ownerNode());
+    document.styleEngine().removePendingSheet(m_sheet->ownerNode());
     return true;
 }
 
 void StyleElement::startLoadingDynamicSheet(Document& document)
 {
-    document.styleEngine()->addPendingSheet();
+    document.styleEngine().addPendingSheet();
 }
 
 DEFINE_TRACE(StyleElement)
 {
     visitor->trace(m_sheet);
 }
 
 }