Use nullptr_t for RefPtr, PassRefPtr and RawPtr.

Source/web/tests/PopupMenuTest.cpp

 /*
  * Copyright (C) 2010 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 85 matching lines @@
     virtual String itemLabel(unsigned) const { return String(); }
     virtual String itemIcon(unsigned) const { return String(); }
     virtual String itemToolTip(unsigned listIndex) const { return itemText(listIndex); }
     virtual String itemAccessibilityText(unsigned listIndex) const { return itemText(listIndex); }
     virtual bool itemIsEnabled(unsigned listIndex) const { return m_disabledIndexSet.find(listIndex) == m_disabledIndexSet.end(); }
     virtual PopupMenuStyle itemStyle(unsigned listIndex) const
     {
         FontDescription fontDescription;
         fontDescription.setComputedSize(12.0);
         Font font(fontDescription);
-        font.update(0);
+        font.update(nullptr);
         return PopupMenuStyle(Color::black, Color::white, font, true, false, Length(), TextDirection(), false /* has text direction override */);
     }
     virtual PopupMenuStyle menuStyle() const { return itemStyle(0); }
     virtual int clientInsetLeft() const { return 0; }
     virtual int clientInsetRight() const { return 0; }
     virtual LayoutUnit clientPaddingLeft() const { return 0; }
     virtual LayoutUnit clientPaddingRight() const { return 0; }
     virtual int listSize() const { return 10; }
     virtual int selectedIndex() const { return m_selectIndex; }
     virtual void popupDidHide() { }
     virtual bool itemIsSeparator(unsigned listIndex) const { return false; }
     virtual bool itemIsLabel(unsigned listIndex) const { return false; }
     virtual bool itemIsSelected(unsigned listIndex) const { return listIndex == m_selectIndex; }
     virtual bool valueShouldChangeOnHotTrack() const { return false; }
     virtual void setTextFromItem(unsigned listIndex) { }
 
     virtual FontSelector* fontSelector() const { return 0; }
     virtual HostWindow* hostWindow() const { return 0; }
 
-    virtual PassRefPtr<Scrollbar> createScrollbar(ScrollableArea*, ScrollbarOrientation, ScrollbarControlSize) { return 0; }
+    virtual PassRefPtr<Scrollbar> createScrollbar(ScrollableArea*, ScrollbarOrientation, ScrollbarControlSize) { return nullptr; }
 
     void setDisabledIndex(unsigned index) { m_disabledIndexSet.insert(index); }
     void setFocusedNode(Node* node) { m_node = node; }
 
 private:
     unsigned m_selectIndex;
     std::set<unsigned> m_disabledIndexSet;
     Node* m_node;
 };
 
@@ skipping 46 matching lines @@
 
 protected:
     virtual void SetUp()
     {
         m_helper.initialize(false, 0, &m_webviewClient);
         m_popupMenu = adoptRef(new PopupMenuChromium(*mainFrame()->frame(), &m_popupMenuClient));
     }
 
     virtual void TearDown()
     {
-        m_popupMenu = 0;
+        m_popupMenu = nullptr;
         Platform::current()->unitTestSupport()->unregisterAllMockedURLs();
     }
 
     // Returns true if there currently is a select popup in the WebView.
     bool popupOpen() const { return webView()->selectPopup(); }
 
     int selectedIndex() const { return m_popupMenuClient.selectedIndex(); }
 
     void showPopup()
     {
@@ skipping 300 matching lines @@
     // menuItemHeight * 1.5 means the Y position on the item at index 1.
     IntPoint row1Point(2, menuItemHeight * 1.5);
     simulateLeftMouseDownEvent(row1Point);
     simulateLeftMouseUpEvent(row1Point);
 
     WebElement element = webView()->mainFrame()->document().getElementById("message");
     EXPECT_STREQ("click", element.innerText().utf8().data());
 }
 
 } // namespace