Remove some dead code from bindings/ folder

Source/bindings/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 21 matching lines @@
 #include "wtf/text/WTFString.h"
 
 namespace WebCore {
 
 class ExternalStringVisitor;
 
 // WebCoreStringResource is a helper class for v8ExternalString. It is used
 // to manage the life-cycle of the underlying buffer of the external string.
 class WebCoreStringResourceBase {
 public:
-    static WebCoreStringResourceBase* toWebCoreStringResourceBase(v8::Handle<v8::String>);
-
     explicit WebCoreStringResourceBase(const String& string)
         : m_plainString(string)
     {
 #ifndef NDEBUG
         m_threadId = WTF::currentThread();
 #endif
         ASSERT(!string.isNull());
         v8::Isolate::GetCurrent()->AdjustAmountOfExternalAllocatedMemory(memoryConsumption(string));
     }
 
@@ skipping 28 matching lines @@
 #endif
         if (m_atomicString.isNull()) {
             m_atomicString = AtomicString(m_plainString);
             ASSERT(!m_atomicString.isNull());
             if (m_plainString.impl() != m_atomicString.impl())
                 v8::Isolate::GetCurrent()->AdjustAmountOfExternalAllocatedMemory(memoryConsumption(m_atomicString.string()));
         }
         return m_atomicString;
     }
 
-    void visitStrings(ExternalStringVisitor*);
-
 protected:
     // A shallow copy of the string. Keeps the string buffer alive until the V8 engine garbage collects it.
     String m_plainString;
     // If this string is atomic or has been made atomic earlier the
     // atomic string is held here. In the case where the string starts
     // off non-atomic and becomes atomic later it is necessary to keep
     // the original string alive because v8 may keep derived pointers
     // into that string.
     AtomicString m_atomicString;
 
@@ skipping 144 matching lines @@
     if (m_v8Object.IsEmpty() || m_v8Object->IsNull() || m_v8Object->IsUndefined()) {
         setString(String());
         return true;
     }
     return prepareBase();
 }
 
 } // namespace WebCore
 
 #endif // V8StringResource_h