Fix virtual/override/final usage in Source/platform/.

Source/platform/fonts/GlyphPageTreeNode.h

 /*
  * Copyright (C) 2006, 2007, 2008 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.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 90 matching lines @@
 public:
     static GlyphPageTreeNodeBase* getRootChild(const FontData* fontData, unsigned pageNumber) { return getRoot(pageNumber)->getChild(fontData, pageNumber); }
     static GlyphPageTreeNode* getNormalRootChild(const FontData* fontData, unsigned pageNumber) { return getRoot(pageNumber)->getNormalChild(fontData, pageNumber); }
 
     static void pruneTreeCustomFontData(const FontData*);
     static void pruneTreeFontData(const SimpleFontData*);
 
     void pruneCustomFontData(const FontData*);
     void pruneFontData(const SimpleFontData*, unsigned level = 0);
 
-    virtual GlyphPage* page(UScriptCode = USCRIPT_COMMON) override final { return m_page.get(); }
+    GlyphPage* page(UScriptCode = USCRIPT_COMMON) final { return m_page.get(); }
 
     GlyphPageTreeNodeBase* getChild(const FontData*, unsigned pageNumber);
     GlyphPageTreeNode* getNormalChild(const FontData*, unsigned pageNumber);
     SystemFallbackGlyphPageTreeNode* getSystemFallbackChild(unsigned pageNumber);
 
     static size_t treeGlyphPageCount();
     size_t pageCount() const;
 
 private:
     GlyphPageTreeNode(GlyphPageTreeNode* parent = nullptr) : GlyphPageTreeNodeBase(parent, false) { }
@@ skipping 12 matching lines @@
     static GlyphPageTreeNode* pageZeroRoot;
 
     RefPtr<GlyphPage> m_page;
     typedef HashMap<const FontData*, OwnPtr<GlyphPageTreeNode>> GlyphPageTreeNodeMap;
     GlyphPageTreeNodeMap m_children;
     OwnPtr<SystemFallbackGlyphPageTreeNode> m_systemFallbackChild;
 };
 
 class PLATFORM_EXPORT SystemFallbackGlyphPageTreeNode : public GlyphPageTreeNodeBase {
 public:
-    virtual GlyphPage* page(UScriptCode = USCRIPT_COMMON) override final;
+    GlyphPage* page(UScriptCode = USCRIPT_COMMON) final;
 
 private:
     friend class GlyphPageTreeNode;
 
     SystemFallbackGlyphPageTreeNode(GlyphPageTreeNode* parent) : GlyphPageTreeNodeBase(parent, true) { }
 
     void pruneFontData(const SimpleFontData*);
     PassRefPtr<GlyphPage> initializePage();
 
     struct UScriptCodeHashTraits : WTF::GenericHashTraits<UScriptCode> {
@@ skipping 31 matching lines @@
 inline GlyphPageTreeNodeBase* GlyphPageTreeNode::getChild(const FontData* fontData, unsigned pageNumber)
 {
     if (fontData)
         return getNormalChild(fontData, pageNumber);
     return getSystemFallbackChild(pageNumber);
 }
 
 } // namespace blink
 
 #endif // GlyphPageTreeNode_h