Don't lazily compile functions that are immediately receded by '('.

src/parser.h

Index: src/parser.h
diff --git a/src/parser.h b/src/parser.h
index 1dfc153362c6831eb4c804614cb4cfb2bb0639cf..460f6647facb6bc7680f3dcf28c8ca583b081527 100644
--- a/src/parser.h
+++ b/src/parser.h
@@ -682,6 +682,11 @@ class Parser {
   ScriptDataImpl* pre_data_;
   FuncNameInferrer* fni_;
   bool stack_overflow_;
+  // If true, the next (and immediately following) function literal is
+  // preceded by a parenthesis.
+  // Heuristically that means that the function will be called immediately,
+  // so never lazily compile it.
+  bool parenthesized_function_;
 };