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

Source/bindings/core/v8/V8StringResource.h

 /*
  * Copyright (C) 2009 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:
  * 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
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 102 matching lines @@
     {
         ASSERT(!string.is8Bit());
     }
 
     explicit WebCoreStringResource16(const AtomicString& string)
         : WebCoreStringResourceBase(string)
     {
         ASSERT(!string.is8Bit());
     }
 
-    virtual size_t length() const override { return m_plainString.impl()->length(); }
-    virtual const uint16_t* data() const override
+    size_t length() const override { return m_plainString.impl()->length(); }
+    const uint16_t* data() const override
     {
         return reinterpret_cast<const uint16_t*>(m_plainString.impl()->characters16());
     }
 };
 
 class WebCoreStringResource8 final : public WebCoreStringResourceBase, public v8::String::ExternalOneByteStringResource {
 public:
     explicit WebCoreStringResource8(const String& string)
         : WebCoreStringResourceBase(string)
     {
         ASSERT(string.is8Bit());
     }
 
     explicit WebCoreStringResource8(const AtomicString& string)
         : WebCoreStringResourceBase(string)
     {
         ASSERT(string.is8Bit());
     }
 
-    virtual size_t length() const override { return m_plainString.impl()->length(); }
-    virtual const char* data() const override
+    size_t length() const override { return m_plainString.impl()->length(); }
+    const char* data() const override
     {
         return reinterpret_cast<const char*>(m_plainString.impl()->characters8());
     }
 };
 
 enum ExternalMode {
     Externalize,
     DoNotExternalize
 };
 
@@ skipping 158 matching lines @@
 }
 
 template<> inline String V8StringResource<TreatNullAndUndefinedAsNullString>::fallbackString() const
 {
     return String();
 }
 
 } // namespace blink
 
 #endif // V8StringResource_h