Cleanup dart to string conversions.

Source/WebCore/bindings/dart/DartDOMWrapper.h

 // Copyright 2011, 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 229 matching lines @@
     template <class BindingsClass>
     static void wrapperWeakCallback(Dart_Handle, void* peer)
     {
         DartDOMData* domData = DartIsolate::currentDOMData();
         typename BindingsClass::NativeType* domObject = static_cast<typename BindingsClass::NativeType*>(peer);
         BindingsClass::NativeTraits::removeWrapper(domData, domObject);
         domObject->deref();
     }
 };
 
-// ParameterAdapter.
-
-template <typename Value>
-class ParameterAdapterBase {
-public:
-    bool conversionSuccessful() const { return !m_exception; }
-
-    Dart_Handle exception() const
-    {
-        ASSERT(!conversionSuccessful());
-        return m_exception;
-    }
-
-protected:
-
-    ParameterAdapterBase()
-        : m_value()
-        , m_exception(0) { }
-
-    void setException(Dart_Handle exception)
-    {
-        ASSERT(exception);
-        m_exception = exception;
-        ASSERT(!conversionSuccessful());
-    }
-
-    const Value& value() const
-    {
-        ASSERT(conversionSuccessful());
-        return m_value;
-    }
-
-    void setValue(Value value)
-    {
-        m_value = value;
-    }
-
-protected:
-    Value m_value;
-
-    template <class C>
-    void init(C* c, Dart_Handle handle)
-    {
-        Dart_Handle exception = 0;
-        this->setValue(c->convert(handle, exception));
-        if (exception)
-            this->setException(exception);
-    }
-
-    template <class C>
-    void init(C* c, Dart_Handle handle, DartUtilities::ConversionFlag conversionFlag)
-    {
-        if (conversionFlag == DartUtilities::ConvertNullToDefaultValue) {
-            if (Dart_IsNull(handle))
-                return;
-        }
-        Dart_Handle exception = 0;
-        this->setValue(c->convert(handle, exception));
-        if (exception)
-            this->setException(exception);
-    }
-
-private:
-    Dart_Handle m_exception;
-};
-
-template <class DartBindingsClass>
-class ParameterAdapter {};
-
-// FIXME: [performance] need better treatment of String vs. AtomicString, cf. v8 implementation.
-template <>
-class ParameterAdapter<String> : public ParameterAdapterBase< RefPtr<StringImpl> > {
-public:
-    explicit ParameterAdapter(Dart_Handle handle, DartUtilities::ConversionFlag flag = DartUtilities::ConvertNone)
-    {
-        Dart_Handle exception = 0;
-        setValue(DartUtilities::toStringImpl(handle, flag, exception));
-        if (exception)
-            setException(exception);
-    }
-    operator String() const { return String(this->value()); }
-    operator AtomicString() const { return AtomicString(this->value()); }
-};
-
 }
 
 #endif // DartDOMWrapper_h