Add stack trace to the promise reject callback.

include/v8.h

Index: include/v8.h
diff --git a/include/v8.h b/include/v8.h
index 7a1c479cc427d69abeecd1e235f2e979e1859e3c..ecf6793e675c985f638ddb4413e08390953a19ec 100644
--- a/include/v8.h
+++ b/include/v8.h
@@ -4215,8 +4215,9 @@ enum PromiseRejectEvent {
 };
 
 typedef void (*PromiseRejectCallback)(Handle<Promise> promise,
+                                      PromiseRejectEvent event,

[aandrey, 2014/10/07 10:32:07]

I think we'd better extract these to smth like v8::PromiseMessage, so that we
could extend it later w/o breaking the embedder's build.

E.g. we may also need to pass ScriptOrigin and MessageLocation in the future
(similar to v8::Message).

                                       Handle<Value> value,
-                                      PromiseRejectEvent event);
+                                      Handle<StackTrace> stack_trace);
 
 // --- Microtask Callback ---
 typedef void (*MicrotaskCallback)(void* data);