Add v8::Promise::Then.

include/v8.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 /** \mainpage V8 API Reference Guide
  *
  * V8 is Google's open source JavaScript engine.
  *
  * This set of documents provides reference material generated from the
  * V8 header file, include/v8.h.
@@ skipping 2616 matching lines @@
   };
 
   /**
    * Register a resolution/rejection handler with a promise.
    * The handler is given the respective resolution/rejection value as
    * an argument. If the promise is already resolved/rejected, the handler is
    * invoked at the end of turn.
    */
   Local<Promise> Chain(Handle<Function> handler);
   Local<Promise> Catch(Handle<Function> handler);
+  Local<Promise> Then(Handle<Function> handler);
 
   V8_INLINE static Promise* Cast(Value* obj);
 
  private:
   Promise();
   static void CheckCast(Value* obj);
 };
 
 
 #ifndef V8_ARRAY_BUFFER_INTERNAL_FIELD_COUNT
@@ skipping 3983 matching lines @@
  */
 
 
 }  // namespace v8
 
 
 #undef TYPE_CHECK
 
 
 #endif  // V8_H_