Introduce Promises.

Source/bindings/v8/custom/V8PromiseCustom.h

Index: Source/bindings/v8/custom/V8PromiseCustom.h
diff --git a/Source/modules/webaudio/AudioBufferCallback.h b/Source/bindings/v8/custom/V8PromiseCustom.h
similarity index 71%
copy from Source/modules/webaudio/AudioBufferCallback.h
copy to Source/bindings/v8/custom/V8PromiseCustom.h
index 8a6c8c606f72750447a9a033d5c8560fcddcbe31..47b64a45ee42e9367b979e579008b06193acb5ec 100644
--- a/Source/modules/webaudio/AudioBufferCallback.h
+++ b/Source/bindings/v8/custom/V8PromiseCustom.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2011, Google Inc. All rights reserved.
+ * 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
@@ -22,25 +22,30 @@
  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-#ifndef AudioBufferCallback_h
-#define AudioBufferCallback_h
+#ifndef V8PromiseCustom_h
+#define V8PromiseCustom_h
 
-#if ENABLE(WEB_AUDIO)
-
-#include "wtf/RefCounted.h"
+#include <v8.h>
 
 namespace WebCore {
 
-class AudioBuffer;
-
-class AudioBufferCallback : public RefCounted<AudioBufferCallback> {
+class V8PromiseCustom {
 public:
-    virtual ~AudioBufferCallback() { }
-    virtual bool handleEvent(AudioBuffer*) = 0;
+    enum InternalFieldIndex {
+        InternalStateIndex,
+        InternalResultIndex,
+        InternalFulfillCallbackIndex,
+        InternalRejectCallbackIndex,
+        InternalFieldCount, // This entry must always be at the bottom.
+    };
+
+    enum PromiseStatus {
+        Pending,
+        Fulfilled,
+        Rejected,
+    };
 };
 
-} // namespace
-
-#endif // ENABLE(WEB_AUDIO)
+} // namespace WebCore
 
-#endif // AudioBufferCallback_h
+#endif // V8PromiseCustom_h