Have Document::elementSheet() return a reference

Source/core/dom/Element.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Peter Kelly (pmk@post.com)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2007 David Smith (catfish.man@gmail.com)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2012, 2013 Apple Inc. All rights reserved.
  *           (C) 2007 Eric Seidel (eric@webkit.org)
  *
  * This library is free software; you can redistribute it and/or
@@ skipping 3337 matching lines @@
 
     // We reconstruct the property set instead of mutating if there is no CSSOM wrapper.
     // This makes wrapperless property sets immutable and so cacheable.
     if (inlineStyle && !inlineStyle->isMutable())
         inlineStyle.clear();
 
     if (!inlineStyle) {
         inlineStyle = BisonCSSParser::parseInlineStyleDeclaration(newStyleString, this);
     } else {
         ASSERT(inlineStyle->isMutable());
-        static_pointer_cast<MutableStylePropertySet>(inlineStyle)->parseDeclaration(newStyleString, document().elementSheet()->contents());
+        static_pointer_cast<MutableStylePropertySet>(inlineStyle)->parseDeclaration(newStyleString, document().elementSheet().contents());
     }
 }
 
 void Element::styleAttributeChanged(const AtomicString& newStyleString, AttributeModificationReason modificationReason)
 {
     ASSERT(isStyledElement());
     WTF::OrdinalNumber startLineNumber = WTF::OrdinalNumber::beforeFirst();
     if (document().scriptableDocumentParser() && !document().isInDocumentWrite())
         startLineNumber = document().scriptableDocumentParser()->lineNumber();
 
@@ skipping 38 matching lines @@
 {
     ASSERT(isStyledElement());
     ensureMutableInlineStyle()->setProperty(propertyID, cssValuePool().createValue(value, unit), important);
     inlineStyleChanged();
     return true;
 }
 
 bool Element::setInlineStyleProperty(CSSPropertyID propertyID, const String& value, bool important)
 {
     ASSERT(isStyledElement());
-    bool changes = ensureMutableInlineStyle()->setProperty(propertyID, value, important, document().elementSheet()->contents());
+    bool changes = ensureMutableInlineStyle()->setProperty(propertyID, value, important, document().elementSheet().contents());
     if (changes)
         inlineStyleChanged();
     return changes;
 }
 
 bool Element::removeInlineStyleProperty(CSSPropertyID propertyID)
 {
     ASSERT(isStyledElement());
     if (!inlineStyle())
         return false;
@@ skipping 82 matching lines @@
     // Before doing so, we need to resolve issues in HTMLSelectElement::recalcListItems
     // and RenderMenuList::setText. See also https://bugs.webkit.org/show_bug.cgi?id=88405
     if (hasTagName(optionTag) || hasTagName(optgroupTag))
         return false;
     if (FullscreenElementStack::isActiveFullScreenElement(this))
         return false;
     return true;
 }
 
 } // namespace WebCore