Chrome::client() should return a ChromeClient reference.

Source/core/dom/FullscreenElementStack.cpp

 /*
  * 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) 2013 Google Inc. All rights reserved.
  *
@@ skipping 222 matching lines @@
                 addDocumentToFullScreenChangeEventQueue(currentDoc);
                 continue;
             }
 
             // 4. Otherwise, do nothing for this document. It stays the same.
         } while (++current != docs.end());
 
         // 5. Return, and run the remaining steps asynchronously.
         // 6. Optionally, perform some animation.
         m_areKeysEnabledInFullScreen = flags & Element::ALLOW_KEYBOARD_INPUT;
-        document()->page()->chrome().client()->enterFullScreenForElement(element);
+        document()->page()->chrome().client().enterFullScreenForElement(element);
 
         // 7. Optionally, display a message indicating how the user can exit displaying the context object fullscreen.
         return;
     } while (0);
 
     m_fullScreenErrorEventTargetQueue.append(element ? element : document()->documentElement());
     m_fullScreenChangeDelayTimer.startOneShot(0);
 }
 
 void FullscreenElementStack::webkitCancelFullScreen()
@@ skipping 70 matching lines @@
 
     // 6. Return, and run the remaining steps asynchronously.
     // 7. Optionally, perform some animation.
 
     if (!document()->page())
         return;
 
     // Only exit out of full screen window mode if there are no remaining elements in the
     // full screen stack.
     if (!newTop) {
-        document()->page()->chrome().client()->exitFullScreenForElement(m_fullScreenElement.get());
+        document()->page()->chrome().client().exitFullScreenForElement(m_fullScreenElement.get());
         return;
     }
 
     // Otherwise, notify the chrome of the new full screen element.
-    document()->page()->chrome().client()->enterFullScreenForElement(newTop);
+    document()->page()->chrome().client().enterFullScreenForElement(newTop);
 }
 
 bool FullscreenElementStack::webkitFullscreenEnabled(Document* document)
 {
     // 4. The fullscreenEnabled attribute must return true if the context object and all ancestor
     // browsing context's documents have their fullscreen enabled flag set, or false otherwise.
 
     // Top-level browsing contexts are implied to have their allowFullScreen attribute set.
     return isAttributeOnAllOwners(allowfullscreenAttr, webkitallowfullscreenAttr, document->ownerElement());
 
@@ skipping 209 matching lines @@
         if (!target)
             target = fullscreen->webkitCurrentFullScreenElement();
     }
 
     if (!target)
         target = doc;
     m_fullScreenChangeEventTargetQueue.append(target);
 }
 
 } // namespace WebCore