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

public/web/WebDocument.h

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 103 matching lines @@
     BLINK_EXPORT WebReferrerPolicy referrerPolicy() const;
     BLINK_EXPORT WebElement createElement(const WebString& tagName);
     // Shorthand of frame()->scrollOffset().
     BLINK_EXPORT WebSize scrollOffset() const;
     // Shorthand of frame()->minimumScrollOffset().
     BLINK_EXPORT WebSize minimumScrollOffset() const;
     // Shorthand of frame()->maximumScrollOffset().
     BLINK_EXPORT WebSize maximumScrollOffset() const;
     BLINK_EXPORT void setIsTransitionDocument();
     BLINK_EXPORT void beginExitTransition(const WebString& cssSelector);
+    BLINK_EXPORT void hideTransitionElements(const WebString& cssSelector);
+    BLINK_EXPORT void showTransitionElements(const WebString& cssSelector);
 
     // Accessibility support. These methods should only be called on the
     // top-level document, because one accessibility cache spans all of
     // the documents on the page.
 
     // Gets the accessibility object for this document.
     BLINK_EXPORT WebAXObject accessibilityObject() const;
 
     // Gets the accessibility object for an object on this page by ID.
     BLINK_EXPORT WebAXObject accessibilityObjectFromID(int axID) const;
@@ skipping 14 matching lines @@
 #if BLINK_IMPLEMENTATION
     WebDocument(const PassRefPtrWillBeRawPtr<Document>&);
     WebDocument& operator=(const PassRefPtrWillBeRawPtr<Document>&);
     operator PassRefPtrWillBeRawPtr<Document>() const;
 #endif
 };
 
 } // namespace blink
 
 #endif