Use nullptr_t for RefPtr, PassRefPtr and RawPtr.

Source/core/svg/properties/NewSVGListPropertyTearOffHelper.h

 /*
  * 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 84 matching lines @@
 
         toDerived()->target()->clear();
     }
 
     PassRefPtr<ItemTearOffType> initialize(PassRefPtr<ItemTearOffType> passItem, ExceptionState& exceptionState)
     {
         RefPtr<ItemTearOffType> item = passItem;
 
         if (toDerived()->isImmutable()) {
             exceptionState.throwDOMException(NoModificationAllowedError, "The object is read-only.");
-            return 0;
+            return nullptr;
         }
 
         if (!item) {
             exceptionState.throwTypeError("Lists must be initialized with a valid item.");
-            return 0;
+            return nullptr;
         }
 
         RefPtr<ItemPropertyType> value = toDerived()->target()->initialize(getValueForInsertionFromTearOff(item));
         toDerived()->commitChange();
 
         return createItemTearOff(value.release());
     }
 
     PassRefPtr<ItemTearOffType> getItem(unsigned long index, ExceptionState& exceptionState)
     {
         RefPtr<ItemPropertyType> value = toDerived()->target()->getItem(index, exceptionState);
         return createItemTearOff(value.release());
     }
 
     PassRefPtr<ItemTearOffType> insertItemBefore(PassRefPtr<ItemTearOffType> passItem, unsigned long index, ExceptionState& exceptionState)
     {
         RefPtr<ItemTearOffType> item = passItem;
 
         if (toDerived()->isImmutable()) {
             exceptionState.throwDOMException(NoModificationAllowedError, "The object is read-only.");
-            return 0;
+            return nullptr;
         }
 
         if (!item) {
             exceptionState.throwTypeError("An invalid item cannot be inserted to a list.");
-            return 0;
+            return nullptr;
         }
 
         RefPtr<ItemPropertyType> value = toDerived()->target()->insertItemBefore(getValueForInsertionFromTearOff(item), index);
         toDerived()->commitChange();
 
         return createItemTearOff(value.release());
     }
 
     PassRefPtr<ItemTearOffType> replaceItem(PassRefPtr<ItemTearOffType> passItem, unsigned long index, ExceptionState& exceptionState)
     {
         RefPtr<ItemTearOffType> item = passItem;
 
         if (toDerived()->isImmutable()) {
             exceptionState.throwDOMException(NoModificationAllowedError, "The object is read-only.");
-            return 0;
+            return nullptr;
         }
 
         if (!item) {
             exceptionState.throwTypeError("An invalid item cannot be replaced with an existing list item.");
-            return 0;
+            return nullptr;
         }
 
         RefPtr<ItemPropertyType> value = toDerived()->target()->replaceItem(getValueForInsertionFromTearOff(item), index, exceptionState);
         toDerived()->commitChange();
 
         return createItemTearOff(value.release());
     }
 
     PassRefPtr<ItemTearOffType> removeItem(unsigned long index, ExceptionState& exceptionState)
     {
         RefPtr<ItemPropertyType> value = toDerived()->target()->removeItem(index, exceptionState);
         toDerived()->commitChange();
 
         return createItemTearOff(value.release());
     }
 
     PassRefPtr<ItemTearOffType> appendItem(PassRefPtr<ItemTearOffType> passItem, ExceptionState& exceptionState)
     {
         RefPtr<ItemTearOffType> item = passItem;
 
         if (toDerived()->isImmutable()) {
             exceptionState.throwDOMException(NoModificationAllowedError, "The object is read-only.");
-            return 0;
+            return nullptr;
         }
 
         if (!item) {
             exceptionState.throwTypeError("An invalid item cannot be appended to a list.");
-            return 0;
+            return nullptr;
         }
 
         RefPtr<ItemPropertyType> value = toDerived()->target()->appendItem(getValueForInsertionFromTearOff(item));
         toDerived()->commitChange();
 
         return createItemTearOff(value.release());
     }
 
 protected:
     NewSVGListPropertyTearOffHelper(PassRefPtr<ListPropertyType> target, SVGElement* contextElement, PropertyIsAnimValType propertyIsAnimVal, const QualifiedName& attributeName = nullQName())
         : NewSVGPropertyTearOff<ListPropertyType>(target, contextElement, propertyIsAnimVal, attributeName)
     {
     }
 
     static PassRefPtr<ItemPropertyType> getValueForInsertionFromTearOff(PassRefPtr<ItemTearOffType> passNewItem)
     {
         return ItemTraits::getValueForInsertionFromTearOff(passNewItem);
     }
 
     PassRefPtr<ItemTearOffType> createItemTearOff(PassRefPtr<ItemPropertyType> value)
     {
         if (!value)
-            return 0;
+            return nullptr;
 
         return ItemTraits::createTearOff(value, toDerived()->contextElement(), toDerived()->propertyIsAnimVal(), toDerived()->attributeName());
     }
 
 private:
     Derived* toDerived() { return static_cast<Derived*>(this); }
 };
 
 }
 
 #endif // NewSVGListPropertyTearOffHelper_h