Reset code age when serializing code objects.

src/serialize.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/v8.h"
 
 #include "src/accessors.h"
 #include "src/api.h"
 #include "src/base/platform/platform.h"
 #include "src/bootstrapper.h"
@@ skipping 1973 matching lines @@
         return;
       // TODO(yangguo): add special handling to canonicalize ICs.
       case Code::FUNCTION:
         // Only serialize the code for the toplevel function. Replace code
         // of included function literals by the lazy compile builtin.
         // This is safe, as checked in Compiler::BuildFunctionInfo.
         if (code_object != main_code_) {
           Code* lazy = *isolate()->builtins()->CompileLazy();
           SerializeBuiltin(lazy, how_to_code, where_to_point);
         } else {
+          code_object->MakeYoung();
           SerializeHeapObject(code_object, how_to_code, where_to_point);
         }
         return;
     }
   }
 
   if (heap_object == source_) {
     SerializeSourceObject(how_to_code, where_to_point);
     return;
   }
@@ skipping 182 matching lines @@
 
 int SerializedCodeData::CheckSum(String* string) {
   int checksum = Version::Hash();
 #ifdef DEBUG
   uint32_t seed = static_cast<uint32_t>(checksum);
   checksum = static_cast<int>(IteratingStringHasher::Hash(string, seed));
 #endif  // DEBUG
   return checksum;
 }
 } }  // namespace v8::internal