Enable preaging of code objects when --optimize-for-size.

src/heap.h

Index: src/heap.h
diff --git a/src/heap.h b/src/heap.h
index f5b99d6e53dd28d794baac7b99807eeb90d8fb08..216b1fdf81b512d6c3a2bca9702e1b1b5f81065d 100644
--- a/src/heap.h
+++ b/src/heap.h
@@ -1131,11 +1131,13 @@ class Heap {
   // self_reference. This allows generated code to reference its own Code
   // object by containing this pointer.
   // Please note this function does not perform a garbage collection.
-  MUST_USE_RESULT MaybeObject* CreateCode(const CodeDesc& desc,
-                                          Code::Flags flags,
-                                          Handle<Object> self_reference,
-                                          bool immovable = false,
-                                          bool crankshafted = false);
+  MUST_USE_RESULT MaybeObject* CreateCode(
+      const CodeDesc& desc,
+      Code::Flags flags,
+      Handle<Object> self_reference,
+      int prologue_offset = Code::kPrologueOffsetNotSet,
+      bool immovable = false,
+      bool crankshafted = false);
 
   MUST_USE_RESULT MaybeObject* CopyCode(Code* code);