Have Text constructor take a Document reference in argument

Source/core/html/BaseButtonInputType.cpp

 /*
  * Copyright (C) 2010 Google Inc. All rights reserved.
  * Copyright (C) 2011 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
@@ skipping 26 matching lines @@
 #include "core/dom/shadow/ShadowRoot.h"
 #include "core/html/HTMLInputElement.h"
 #include "core/rendering/RenderButton.h"
 #include "core/rendering/RenderTextFragment.h"
 
 namespace WebCore {
 
 using namespace HTMLNames;
 
 class NonSelectableText : public Text {
-    inline NonSelectableText(Document* document, const String& data)
+    inline NonSelectableText(Document& document, const String& data)
         : Text(document, data, CreateText)
     {
     }
 
     virtual RenderText* createTextRenderer(RenderStyle*) OVERRIDE
     {
         return new RenderTextFragment(this, dataImpl());
     }
 
 public:
-    static inline PassRefPtr<NonSelectableText> create(Document* document, const String& data)
+    static inline PassRefPtr<NonSelectableText> create(Document& document, const String& data)
     {
         return adoptRef(new NonSelectableText(document, data));
     }
 };
 
 // ----------------------------
 
 void BaseButtonInputType::createShadowSubtree()
 {
     ASSERT(element()->userAgentShadowRoot());
-    RefPtr<Text> text = NonSelectableText::create(&element()->document(), element()->valueWithDefault());
+    RefPtr<Text> text = NonSelectableText::create(element()->document(), element()->valueWithDefault());
     element()->userAgentShadowRoot()->appendChild(text);
 }
 
 void BaseButtonInputType::valueAttributeChanged()
 {
     toText(element()->userAgentShadowRoot()->firstChild())->setData(element()->valueWithDefault());
 }
 
 bool BaseButtonInputType::shouldSaveAndRestoreFormControlState() const
 {
@@ skipping 15 matching lines @@
 {
     return false;
 }
 
 void BaseButtonInputType::setValue(const String& sanitizedValue, bool, TextFieldEventBehavior)
 {
     element()->setAttribute(valueAttr, sanitizedValue);
 }
 
 } // namespace WebCore