Pass implementation object to supplemental classes by reference

Source/core/testing/InternalSettings.h

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  * Copyright (C) 2013 Apple 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 54 matching lines @@
         bool m_imagesEnabled;
         bool m_shouldDisplaySubtitles;
         bool m_shouldDisplayCaptions;
         bool m_shouldDisplayTextDescriptions;
         String m_defaultVideoPosterURL;
         bool m_originalCompositorDrivenAcceleratedScrollEnabled;
         bool m_originalLayerSquashingEnabled;
         bool m_originalPasswordGenerationDecorationEnabled;
     };
 
-    static PassRefPtr<InternalSettings> create(Page* page)
+    static PassRefPtr<InternalSettings> create(Page& page)
     {
         return adoptRef(new InternalSettings(page));
     }
-    static InternalSettings* from(Page*);
+    static InternalSettings* from(Page&);
     void hostDestroyed() { m_page = 0; }
 
     virtual ~InternalSettings();
     void resetToConsistentState();
 
     void setStandardFontFamily(const AtomicString& family, const String& script, ExceptionState&);
     void setSerifFontFamily(const AtomicString& family, const String& script, ExceptionState&);
     void setSansSerifFontFamily(const AtomicString& family, const String& script, ExceptionState&);
     void setFixedFontFamily(const AtomicString& family, const String& script, ExceptionState&);
     void setCursiveFontFamily(const AtomicString& family, const String& script, ExceptionState&);
@@ skipping 25 matching lines @@
     // be removed or moved onto internals.runtimeFlags:
     void setAuthorShadowDOMForAnyElementEnabled(bool);
     void setCSSExclusionsEnabled(bool);
     void setExperimentalWebSocketEnabled(bool);
     void setLangAttributeAwareFormControlUIEnabled(bool);
     void setOverlayScrollbarsEnabled(bool);
     void setStyleScopedEnabled(bool);
     void setExperimentalContentSecurityPolicyFeaturesEnabled(bool);
 
 private:
-    explicit InternalSettings(Page*);
+    explicit InternalSettings(Page&);
 
     Settings* settings() const;
     Page* page() const { return m_page; }
     static const char* supplementName();
 
     Page* m_page;
     Backup m_backup;
 };
 
 } // namespace WebCore
 
 #endif