Pass implementation object to supplemental classes by reference

Source/web/FullscreenController.cpp

 /*
  * Copyright (C) 2013 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 47 matching lines @@
 }
 
 void FullscreenController::willEnterFullScreen()
 {
     if (!m_provisionalFullScreenElement)
         return;
 
     // Ensure that this element's document is still attached.
     Document& doc = m_provisionalFullScreenElement->document();
     if (doc.frame()) {
-        FullscreenElementStack::from(&doc)->webkitWillEnterFullScreenForElement(m_provisionalFullScreenElement.get());
+        FullscreenElementStack::from(doc).webkitWillEnterFullScreenForElement(m_provisionalFullScreenElement.get());
         m_fullScreenFrame = doc.frame();
     }
     m_provisionalFullScreenElement.clear();
 }
 
 void FullscreenController::didEnterFullScreen()
 {
     if (!m_fullScreenFrame)
         return;
 
     if (Document* doc = m_fullScreenFrame->document()) {
-        if (FullscreenElementStack::isFullScreen(doc)) {
+        if (FullscreenElementStack::isFullScreen(*doc)) {
             if (!m_exitFullscreenPageScaleFactor) {
                 m_exitFullscreenPageScaleFactor = m_webViewImpl->pageScaleFactor();
                 m_exitFullscreenScrollOffset = m_webViewImpl->mainFrame()->scrollOffset();
                 m_webViewImpl->setPageScaleFactorPreservingScrollOffset(1.0f);
             }
 
-            FullscreenElementStack::from(doc)->webkitDidEnterFullScreenForElement(0);
+            FullscreenElementStack::from(*doc).webkitDidEnterFullScreenForElement(0);
             if (RuntimeEnabledFeatures::overlayFullscreenVideoEnabled()) {
-                Element* element = FullscreenElementStack::currentFullScreenElementFrom(doc);
+                Element* element = FullscreenElementStack::currentFullScreenElementFrom(*doc);
                 ASSERT(element);
                 if (element->isMediaElement() && m_webViewImpl->layerTreeView())
                     m_webViewImpl->layerTreeView()->setHasTransparentBackground(true);
             }
         }
     }
 }
 
 void FullscreenController::willExitFullScreen()
 {
     if (!m_fullScreenFrame)
         return;
 
     if (Document* doc = m_fullScreenFrame->document()) {
-        FullscreenElementStack* fullscreen = FullscreenElementStack::fromIfExists(doc);
+        FullscreenElementStack* fullscreen = FullscreenElementStack::fromIfExists(*doc);
         if (!fullscreen)
             return;
-        if (fullscreen->isFullScreen(doc)) {
+        if (fullscreen->isFullScreen(*doc)) {
             // When the client exits from full screen we have to call webkitCancelFullScreen to
             // notify the document. While doing that, suppress notifications back to the client.
             m_isCancelingFullScreen = true;
             fullscreen->webkitCancelFullScreen();
             m_isCancelingFullScreen = false;
             fullscreen->webkitWillExitFullScreenForElement(0);
             if (RuntimeEnabledFeatures::overlayFullscreenVideoEnabled() && m_webViewImpl->layerTreeView())
                 m_webViewImpl->layerTreeView()->setHasTransparentBackground(m_webViewImpl->isTransparent());
         }
     }
 }
 
 void FullscreenController::didExitFullScreen()
 {
     if (!m_fullScreenFrame)
         return;
 
     if (Document* doc = m_fullScreenFrame->document()) {
-        if (FullscreenElementStack* fullscreen = FullscreenElementStack::fromIfExists(doc)) {
+        if (FullscreenElementStack* fullscreen = FullscreenElementStack::fromIfExists(*doc)) {
             if (fullscreen->webkitIsFullScreen()) {
                 if (m_exitFullscreenPageScaleFactor) {
                     m_webViewImpl->setPageScaleFactor(m_exitFullscreenPageScaleFactor,
                         WebPoint(m_exitFullscreenScrollOffset.width(), m_exitFullscreenScrollOffset.height()));
                     m_exitFullscreenPageScaleFactor = 0;
                     m_exitFullscreenScrollOffset = IntSize();
                 }
 
                 fullscreen->webkitDidExitFullScreenForElement(0);
             }
@@ skipping 51 matching lines @@
         if (mediaElement->player())
             mediaElement->player()->hideFullscreenOverlay();
         return;
     }
     if (WebViewClient* client = m_webViewImpl->client())
         client->exitFullScreen();
 }
 
 }