[serializer] add options to compile eagerly and pre-age for code cache.

src/objects.cc

 // Copyright 2015 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/objects.h"
 
 #include <cmath>
 #include <iomanip>
 #include <sstream>
 
@@ skipping 14338 matching lines @@
 static bool IsOldAge(Code::Age age) {
   return age >= Code::kIsOldCodeAge || age == Code::kNotExecutedCodeAge;
 }
 
 
 void Code::MakeYoung(Isolate* isolate) {
   byte* sequence = FindCodeAgeSequence();
   if (sequence != NULL) MakeCodeAgeSequenceYoung(sequence, isolate);
 }
 
+void Code::PreAge(Isolate* isolate) {
+  byte* sequence = FindCodeAgeSequence();
+  if (sequence != NULL) {
+    PatchPlatformCodeAge(isolate, sequence, kPreAgedCodeAge, NO_MARKING_PARITY);
+  }
+}
 
 void Code::MarkToBeExecutedOnce(Isolate* isolate) {
   byte* sequence = FindCodeAgeSequence();
   if (sequence != NULL) {
     PatchPlatformCodeAge(isolate, sequence, kToBeExecutedOnceCodeAge,
                          NO_MARKING_PARITY);
   }
 }
 
-
 void Code::MakeOlder(MarkingParity current_parity) {
   byte* sequence = FindCodeAgeSequence();
   if (sequence != NULL) {
     Age age;
     MarkingParity code_parity;
     Isolate* isolate = GetIsolate();
     GetCodeAgeAndParity(isolate, sequence, &age, &code_parity);
     Age next_age = NextAge(age);
     if (age != next_age && code_parity != current_parity) {
       PatchPlatformCodeAge(isolate, sequence, next_age, current_parity);
@@ skipping 5411 matching lines @@
   if (cell->value() != *new_value) {
     cell->set_value(*new_value);
     Isolate* isolate = cell->GetIsolate();
     cell->dependent_code()->DeoptimizeDependentCodeGroup(
         isolate, DependentCode::kPropertyCellChangedGroup);
   }
 }
 
 }  // namespace internal
 }  // namespace v8