Stash ComputedStyles on new HeapHashMap on Document.

third_party/WebKit/Source/core/dom/Document.h

 /*
  * 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, 2010, 2012 Apple Inc. All
  * rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved.
  * (http://www.torchmobile.com/)
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
@@ skipping 310 matching lines @@
   Element* createElementNS(const AtomicString& namespaceURI,
                            const AtomicString& qualifiedName,
                            ExceptionState&);
   Element* createElement(const QualifiedName&, CreateElementFlags);
 
   Element* elementFromPoint(int x, int y) const;
   HeapVector<Member<Element>> elementsFromPoint(int x, int y) const;
   Range* caretRangeFromPoint(int x, int y);
   Element* scrollingElement();
 
+  void addNonAttachedStyle(Element&, RefPtr<ComputedStyle>);
+  RefPtr<ComputedStyle> getNonAttachedStyle(Element&);

[esprehn, 2016/10/05 03:37:22]

This should return ComputedStyle* btw, you're not returning ownership, the map
keeps that. =

[nainar, 2016/10/05 04:33:12]

Done.

+
   String readyState() const;
 
   AtomicString characterSet() const { return Document::encodingName(); }
 
   AtomicString encodingName() const;
 
   void setContent(const String&);
 
   String suggestedMIMEType() const;
   void setMimeType(const AtomicString&);
@@ skipping 1063 matching lines @@
   PendingSheetLayout m_pendingSheetLayout;
 
   Member<LocalFrame> m_frame;
   Member<LocalDOMWindow> m_domWindow;
   Member<HTMLImportsController> m_importsController;
 
   Member<ResourceFetcher> m_fetcher;
   Member<DocumentParser> m_parser;
   Member<ContextFeatures> m_contextFeatures;
 
+  HeapHashMap<Member<Element>, RefPtr<ComputedStyle>> m_nonAttachedStyle;
+
   bool m_wellFormed;
 
   // Document URLs.
   KURL m_url;  // Document.URL: The URL from which this document was retrieved.
   KURL m_baseURL;  // Node.baseURI: The URL to use when resolving relative URLs.
   KURL m_baseURLOverride;  // An alternative base URL that takes precedence over
                            // m_baseURL (but not m_baseElementURL).
   KURL m_baseElementURL;   // The URL set by the <base> element.
   KURL m_cookieURL;        // The URL to use for cookie access.
   std::unique_ptr<OriginAccessEntry> m_accessEntryFromURL;
@@ skipping 256 matching lines @@
 DEFINE_TYPE_CASTS(TreeScope, Document, document, true, true);
 
 }  // namespace blink
 
 #ifndef NDEBUG
 // Outside the WebCore namespace for ease of invocation from gdb.
 CORE_EXPORT void showLiveDocumentInstances();
 #endif
 
 #endif  // Document_h