Add ByteString support to IDL bindings

Source/bindings/v8/V8Binding.h

 /*
 * Copyright (C) 2009 Google Inc. All rights reserved.
 * Copyright (C) 2012 Ericsson AB. 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.
@@ skipping 507 matching lines @@
 
 // Convert a value to a single precision float, which might fail.
 float toFloat(v8::Handle<v8::Value>, ExceptionState&);
 
 // Convert a value to a single precision float assuming the conversion cannot fail.
 inline float toFloat(v8::Local<v8::Value> value)
 {
     return static_cast<float>(value->NumberValue());
 }
 
+// Converts a value to a String, throwing if any code unit is outside 0-255.
+String toByteString(v8::Handle<v8::Value>, ExceptionState&);
+
 inline v8::Handle<v8::Boolean> v8Boolean(bool value, v8::Isolate* isolate)
 {
     return value ? v8::True(isolate) : v8::False(isolate);
 }
 
 inline double toCoreDate(v8::Handle<v8::Value> object)
 {
     if (object->IsDate())
         return v8::Handle<v8::Date>::Cast(object)->ValueOf();
     if (object->IsNumber())
@@ skipping 399 matching lines @@
     RefPtr<ScriptState> m_scriptState;
 };
 
 void GetDevToolsFunctionInfo(v8::Handle<v8::Function>, v8::Isolate*, int& scriptId, String& resourceName, int& lineNumber);
 PassRefPtr<TraceEvent::ConvertableToTraceFormat> devToolsTraceEventData(ExecutionContext*, v8::Handle<v8::Function>, v8::Isolate*);
 
 
 } // namespace WebCore
 
 #endif // V8Binding_h