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

src/assembler.h

 // Copyright (c) 1994-2006 Sun Microsystems Inc.
 // All Rights Reserved.
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 // - Redistributions of source code must retain the above copyright notice,
 // this list of conditions and the following disclaimer.
 //
@@ skipping 383 matching lines @@
   INLINE(void set_target_object(Object* target,
                                 WriteBarrierMode mode = UPDATE_WRITE_BARRIER));
   INLINE(Address target_runtime_entry(Assembler* origin));
   INLINE(void set_target_runtime_entry(Address target,
                                        WriteBarrierMode mode =
                                            UPDATE_WRITE_BARRIER));
   INLINE(Cell* target_cell());
   INLINE(Handle<Cell> target_cell_handle());
   INLINE(void set_target_cell(Cell* cell,
                               WriteBarrierMode mode = UPDATE_WRITE_BARRIER));
+  INLINE(Handle<Object> code_age_stub_handle(Assembler* origin));
   INLINE(Code* code_age_stub());
   INLINE(void set_code_age_stub(Code* stub));
 
   // Read the address of the word containing the target_address in an
   // instruction stream.  What this means exactly is architecture-independent.
   // The only architecture-independent user of this function is the serializer.
   // The serializer uses it to find out how many raw bytes of instruction to
   // output before the next target.  Architecture-independent code shouldn't
   // dereference the pointer it gets back from this.
   INLINE(Address target_address_address());
@@ skipping 306 matching lines @@
   static ExternalReference fill_heap_number_with_random_function(
       Isolate* isolate);
   static ExternalReference random_uint32_function(Isolate* isolate);
   static ExternalReference transcendental_cache_array_address(Isolate* isolate);
   static ExternalReference delete_handle_scope_extensions(Isolate* isolate);
 
   static ExternalReference get_date_field_function(Isolate* isolate);
   static ExternalReference date_cache_stamp(Isolate* isolate);
 
   static ExternalReference get_make_code_young_function(Isolate* isolate);
+  static ExternalReference get_mark_code_as_executed_function(Isolate* isolate);
 
   // New heap objects tracking support.
   static ExternalReference record_object_allocation_function(Isolate* isolate);
 
   // Deoptimization support.
   static ExternalReference new_deoptimizer_function(Isolate* isolate);
   static ExternalReference compute_output_frames_function(Isolate* isolate);
 
   // Log support.
   static ExternalReference log_enter_external_function(Isolate* isolate);
@@ skipping 332 matching lines @@
  public:
   NullCallWrapper() { }
   virtual ~NullCallWrapper() { }
   virtual void BeforeCall(int call_size) const { }
   virtual void AfterCall() const { }
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_ASSEMBLER_H_