Introduce Promises.

Source/bindings/v8/custom/V8PromiseResolverCustom.cpp

Index: Source/bindings/v8/custom/V8PromiseResolverCustom.cpp
diff --git a/Source/core/dom/MessagePortChannel.cpp b/Source/bindings/v8/custom/V8PromiseResolverCustom.cpp
similarity index 93%
copy from Source/core/dom/MessagePortChannel.cpp
copy to Source/bindings/v8/custom/V8PromiseResolverCustom.cpp
index be0712023d17473e9a2d6079bccc852a0347ee1e..b2a364c7add90350ee416981f9db836e7b3d2cd4 100644
--- a/Source/core/dom/MessagePortChannel.cpp
+++ b/Source/bindings/v8/custom/V8PromiseResolverCustom.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2009 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 are
@@ -27,9 +27,11 @@
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
+
 #include "config.h"
-#include "core/dom/MessagePortChannel.h"
+#include "V8PromiseResolver.h"
 

[do-not-use, 2013/06/21 15:04:58]

Why this empty file? Do you anticipate to add things here soon?

[yhirano, 2013/06/24 03:33:34]

No. As in the issue description, We define the class to make the IDL processor
happy. We might fix the IDL processor in the future, not in this CL.

-namespace WebCore {
+#include <v8.h>
 
+namespace WebCore {
 } // namespace WebCore