Add type field to AST expression nodes

src/factory.h

Index: src/factory.h
diff --git a/src/factory.h b/src/factory.h
index 233b3b01c824973f6376edccffa2d0aac131b89e..66304a9399218f663c0350580486309ff9d81ec7 100644
--- a/src/factory.h
+++ b/src/factory.h
@@ -369,33 +369,33 @@ class Factory {
 
   // Interface for creating error objects.
 
-  Handle<Object> NewError(const char* maker, const char* type,
+  Handle<Object> NewError(const char* maker, const char* message,
                           Handle<JSArray> args);
-  Handle<String> EmergencyNewError(const char* type, Handle<JSArray> args);
-  Handle<Object> NewError(const char* maker, const char* type,
+  Handle<String> EmergencyNewError(const char* message, Handle<JSArray> args);
+  Handle<Object> NewError(const char* maker, const char* message,
                           Vector< Handle<Object> > args);
-  Handle<Object> NewError(const char* type,
+  Handle<Object> NewError(const char* message,
                           Vector< Handle<Object> > args);
   Handle<Object> NewError(Handle<String> message);
   Handle<Object> NewError(const char* constructor,
                           Handle<String> message);
 
-  Handle<Object> NewTypeError(const char* type,
+  Handle<Object> NewTypeError(const char* message,
                               Vector< Handle<Object> > args);
   Handle<Object> NewTypeError(Handle<String> message);
 
-  Handle<Object> NewRangeError(const char* type,
+  Handle<Object> NewRangeError(const char* message,
                                Vector< Handle<Object> > args);
   Handle<Object> NewRangeError(Handle<String> message);
 
-  Handle<Object> NewSyntaxError(const char* type, Handle<JSArray> args);
+  Handle<Object> NewSyntaxError(const char* message, Handle<JSArray> args);
   Handle<Object> NewSyntaxError(Handle<String> message);
 
-  Handle<Object> NewReferenceError(const char* type,
+  Handle<Object> NewReferenceError(const char* message,
                                    Vector< Handle<Object> > args);
   Handle<Object> NewReferenceError(Handle<String> message);
 
-  Handle<Object> NewEvalError(const char* type,
+  Handle<Object> NewEvalError(const char* message,
                               Vector< Handle<Object> > args);