Remove some dead code from bindings/ folder

Source/bindings/v8/V8StringResource.h

Index: Source/bindings/v8/V8StringResource.h
diff --git a/Source/bindings/v8/V8StringResource.h b/Source/bindings/v8/V8StringResource.h
index feb63a990952c79ad04828cd77fe693c67edb140..e11002e5b0492b719f3bb4e560c5610ef63c0dce 100644
--- a/Source/bindings/v8/V8StringResource.h
+++ b/Source/bindings/v8/V8StringResource.h
@@ -39,8 +39,6 @@ class ExternalStringVisitor;
 // 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)
     {
@@ -89,8 +87,6 @@ public:
         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;