Introduce Promise mapping to the IDL generator

Source/bindings/v8/ScriptPromise.h

 /*
  * Copyright (C) 2013 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 10 matching lines @@
  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-#ifndef ScriptString_h
-#define ScriptString_h
+#ifndef ScriptPromise_h
+#define ScriptPromise_h
 
+#include "bindings/v8/ScopedPersistent.h"
 #include "bindings/v8/ScriptValue.h"
-#include "bindings/v8/V8Binding.h"
-#include "wtf/text/WTFString.h"
+#include "bindings/v8/V8ScriptRunner.h"
+#include <v8.h>
 
 namespace WebCore {
 
-class ScriptString : public ScriptValue {
+class ScriptPromise : public ScriptValue {
 public:
-    ScriptString() { }
-    explicit ScriptString(v8::Handle<v8::String> value) : ScriptValue(value) { }
+    ScriptPromise()
+        : ScriptValue()
+    {
+    }
 
-    ScriptString concatenateWith(const String&);
-    String flattenToString() const;
+    explicit ScriptPromise(ScriptValue promise)
+        : ScriptValue(promise)
+    {
+        ASSERT(!hasNoValue());
+    }
+
+    explicit ScriptPromise(v8::Handle<v8::Value> promise)
+        : ScriptValue(promise)
+    {
+        ASSERT(!hasNoValue());
+    }
+
+    bool isUndefinedOrNull() const
+    {
+        return isUndefined() || isNull();
+    }
 };
 
 } // namespace WebCore
 
-#endif // ScriptString_h
+
+#endif // ScriptPromise_h