Teach Scopes whether they will end up being lazily compiled or not

src/parsing/parser.h

Index: src/parsing/parser.h
diff --git a/src/parsing/parser.h b/src/parsing/parser.h
index 45b4d2b2e3b39b2c949a4b544bb9d62b1b8fc410..3a3f74f8e668eb2acada6d56e9be8a97a05606a0 100644
--- a/src/parsing/parser.h
+++ b/src/parsing/parser.h
@@ -205,6 +205,9 @@ class Parser : public ParserBase<Parser> {
   friend class ParserBase<Parser>;
   friend class v8::internal::ExpressionClassifier<ParserTypes<Parser>>;
 
+  // Determine if the given function should be lazily compiled.
+  bool ShouldCompileLazily(FunctionLiteral* fun);
+
   // Runtime encoding of different completion modes.
   enum CompletionKind {
     kNormalCompletion,