Implement Promise.prototype.then and Promise.prototype.catch

Source/bindings/v8/custom/V8PromiseCustom.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:
  * 1.  Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 21 matching lines @@
 class V8PromiseCustom {
 public:
     enum InternalFieldIndex {
         InternalStateIndex,
         InternalResultIndex,
         InternalFulfillCallbackIndex,
         InternalRejectCallbackIndex,
         InternalFieldCount, // This entry must always be at the bottom.
     };
 
+    enum WrapperCallbackEnvironmentFieldIndex {
+        WrapperCallbackEnvironmentPromiseIndex,
+        WrapperCallbackEnvironmentPromiseResolverIndex,
+        WrapperCallbackEnvironmentCallbackIndex,
+        WrapperCallbackEnvironmentFieldCount, // This entry must always be at the bottom.
+    };
+
     enum PromiseAlgorithm {
         FulfillAlgorithm,
         ResolveAlgorithm,
         RejectAlgorithm,
     };
 
     enum PromiseState {
         Pending,
         Fulfilled,
         Rejected,
@@ skipping 42 matching lines @@
     static void setState(v8::Handle<v8::Object> internal, PromiseState);
 
     // Call |function| synchronously or asynchronously, depending on |mode|.
     // If |function| throws an exception, this function catches it and does not rethrow.
     static void call(v8::Handle<v8::Function> /* function */, v8::Handle<v8::Object> receiver, v8::Handle<v8::Value> result, SynchronousMode /* mode */, v8::Isolate*);
 };
 
 } // namespace WebCore
 
 #endif // V8PromiseCustom_h