Navigation transitions (web to native app): Hide/Show transition elements (Blink side)

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)
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
@@ skipping 368 matching lines @@
     bool hasSVGRootNode() const;
 
     bool isFrameSet() const;
 
     bool isSrcdocDocument() const { return m_isSrcdocDocument; }
     bool isMobileDocument() const { return m_isMobileDocument; }
 
     bool isTransitionDocument() const { return m_isTransitionDocument; }
     void setIsTransitionDocument() { m_isTransitionDocument = true; }
     void hideTransitionElements(const AtomicString& cssSelector);
+    void showTransitionElements(const AtomicString& cssSelector);
 
     struct TransitionElement {
         String id;
         IntRect rect;
     };
 
     struct TransitionElementData {
         String scope;
         String selector;
         String markup;
@@ skipping 761 matching lines @@
     void processHttpEquivContentSecurityPolicy(const AtomicString& equiv, const AtomicString& content);
 
     bool haveStylesheetsLoaded() const;
 
     void setHoverNode(PassRefPtrWillBeRawPtr<Node>);
     Node* hoverNode() const { return m_hoverNode.get(); }
 
     using EventFactorySet = HashSet<OwnPtr<EventFactoryBase>>;
     static EventFactorySet& eventFactories();
 
+    void updateElementOpacity(const AtomicString& cssSelector, double opacity);
+
     DocumentLifecycle m_lifecycle;
 
     bool m_hasNodesWithPlaceholderStyle;
     bool m_evaluateMediaQueriesOnStyleRecalc;
 
     // If we do ignore the pending stylesheet count, then we need to add a boolean
     // to track that this happened so that we can do a full repaint when the stylesheets
     // do eventually load.
     PendingSheetLayout m_pendingSheetLayout;
 
@@ skipping 248 matching lines @@
 DEFINE_TYPE_CASTS(TreeScope, Document, document, true, true);
 
 } // namespace blink
 
 #ifndef NDEBUG
 // Outside the WebCore namespace for ease of invocation from gdb.
 void showLiveDocumentInstances();
 #endif
 
 #endif // Document_h