Move FormatStackTrace to C++

src/isolate.h

Index: src/isolate.h
diff --git a/src/isolate.h b/src/isolate.h
index 2753373e29b0e7372889eebc3892dae5e5a27648..ab43336254046e0d148d905433b2c98b1a356ccd 100644
--- a/src/isolate.h
+++ b/src/isolate.h
@@ -126,6 +126,16 @@ typedef ZoneList<Handle<Object> > ZoneObjectList;
 #define RETURN_EXCEPTION_IF_SCHEDULED_EXCEPTION(isolate, T) \
   RETURN_VALUE_IF_SCHEDULED_EXCEPTION(isolate, MaybeHandle<T>())
 
+#define RETURN_RESULT(isolate, call, T)           \

[jgruber, 2016/07/29 11:54:37]

This is related to RETURN_RESULT_OR_FAILURE as ASSIGN_RETURN_ON_EXCEPTION is
related to ASSIGN_RETURN_FAILURE_ON_EXCEPTION.

+  do {                                            \
+    Handle<T> __result__;                         \
+    if (!(call).ToHandle(&__result__)) {          \
+      DCHECK((isolate)->has_pending_exception()); \
+      return MaybeHandle<T>();                    \
+    }                                             \
+    return __result__;                            \
+  } while (false)
+
 #define RETURN_RESULT_OR_FAILURE(isolate, call)     \
   do {                                              \
     Handle<Object> __result__;                      \