Support compaction for code space pages.

src/liveedit.cc

Index: src/liveedit.cc
diff --git a/src/liveedit.cc b/src/liveedit.cc
index f6e18f6090cca2b722d95fa77ddcbc734ec2672e..8b8629b091b5d4b9281bfa3713bdff5bdd904193 100644
--- a/src/liveedit.cc
+++ b/src/liveedit.cc
@@ -981,9 +981,7 @@ class ReferenceCollectorVisitor : public ObjectVisitor {
     }
     Address substitution_entry = substitution->instruction_start();
     for (int i = 0; i < reloc_infos_.length(); i++) {
-      reloc_infos_[i].set_target_address(substitution_entry, NULL);
-      substitution->GetHeap()->incremental_marking()->RecordWriteOf(
-          substitution);
+      reloc_infos_[i].set_target_address(substitution_entry);
     }
     for (int i = 0; i < code_entries_.length(); i++) {
       Address entry = code_entries_[i];
@@ -1418,7 +1416,7 @@ void LiveEdit::ReplaceRefToNestedFunction(
   for (RelocIterator it(parent_shared->code()); !it.done(); it.next()) {
     if (it.rinfo()->rmode() == RelocInfo::EMBEDDED_OBJECT) {
       if (it.rinfo()->target_object() == *orig_shared) {
-        it.rinfo()->set_target_object(*subst_shared, NULL);
+        it.rinfo()->set_target_object(*subst_shared);
       }
     }
   }