Create a separate class to encapsulate ScopeInfo serialization....

src/objects-inl.h

Index: src/objects-inl.h
===================================================================
--- src/objects-inl.h	(revision 5059)
+++ src/objects-inl.h	(working copy)
@@ -2511,7 +2511,6 @@
 #endif
 
 ACCESSORS(SharedFunctionInfo, name, Object, kNameOffset)
-ACCESSORS(SharedFunctionInfo, scope_info, Object, kScopeInfoOffset)
 ACCESSORS(SharedFunctionInfo, construct_stub, Code, kConstructStubOffset)
 ACCESSORS(SharedFunctionInfo, instance_class_name, Object,
           kInstanceClassNameOffset)
@@ -2648,6 +2647,19 @@
 }
 
 
+SerializedScopeInfo* SharedFunctionInfo::scope_info() {
+  return reinterpret_cast<SerializedScopeInfo*>(
+      READ_FIELD(this, kScopeInfoOffset));
+}
+
+
+void SharedFunctionInfo::set_scope_info(SerializedScopeInfo* value,
+                                        WriteBarrierMode mode) {
+  WRITE_FIELD(this, kScopeInfoOffset, reinterpret_cast<Object*>(value));
+  CONDITIONAL_WRITE_BARRIER(this, kScopeInfoOffset, mode);
+}
+
+
 bool SharedFunctionInfo::is_compiled() {
   // TODO(1242782): Create a code kind for uncompiled code.
   return code()->kind() != Code::STUB;