Pass implementation object to supplemental classes by reference

Source/core/html/shadow/MediaControlElements.cpp

 /*
  * Copyright (C) 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2012 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:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
@@ skipping 537 matching lines @@
 void MediaControlFullscreenButtonElement::defaultEventHandler(Event* event)
 {
     if (event->type() == EventTypeNames::click) {
         // Only use the new full screen API if the fullScreenEnabled setting has
         // been explicitly enabled. Otherwise, use the old fullscreen API. This
         // allows apps which embed a WebView to retain the existing full screen
         // video implementation without requiring them to implement their own full
         // screen behavior.
         if (document().settings() && document().settings()->fullScreenEnabled()) {
             if (FullscreenElementStack::isActiveFullScreenElement(toParentMediaElement(this)))
-                FullscreenElementStack::from(&document())->webkitCancelFullScreen();
+                FullscreenElementStack::from(document()).webkitCancelFullScreen();
             else
-                FullscreenElementStack::from(&document())->requestFullScreenForElement(toParentMediaElement(this), 0, FullscreenElementStack::ExemptIFrameAllowFullScreenRequirement);
+                FullscreenElementStack::from(document()).requestFullScreenForElement(toParentMediaElement(this), 0, FullscreenElementStack::ExemptIFrameAllowFullScreenRequirement);
         } else
             mediaController()->enterFullscreen();
         event->setDefaultHandled();
     }
     HTMLInputElement::defaultEventHandler(event);
 }
 
 const AtomicString& MediaControlFullscreenButtonElement::shadowPseudoId() const
 {
     DEFINE_STATIC_LOCAL(AtomicString, id, ("-webkit-media-controls-fullscreen-button", AtomicString::ConstructFromLiteral));
@@ skipping 175 matching lines @@
     float fontSize = smallestDimension * 0.05f;
     if (fontSize != m_fontSize) {
         m_fontSize = fontSize;
         setInlineStyleProperty(CSSPropertyFontSize, fontSize, CSSPrimitiveValue::CSS_PX);
     }
 }
 
 // ----------------------------
 
 } // namespace WebCore