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 0bd2c405f0ee09a78e6a3fea5d67317b6662edcb..92e8089128628ef9aa516041a95f20921ba9ed29 100644
--- a/src/heap.h
+++ b/src/heap.h
@@ -1125,11 +1125,13 @@ 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,
+      bool immovable = false,
+      bool crankshafted = false,
+      int prologue_offset = Code::kPrologueOffsetNotSet);
 
   MUST_USE_RESULT MaybeObject* CopyCode(Code* code);