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

src/profile-generator.cc

Index: src/profile-generator.cc
===================================================================
--- src/profile-generator.cc	(revision 5059)
+++ src/profile-generator.cc	(working copy)
@@ -1555,12 +1555,13 @@
     JSFunction* func = JSFunction::cast(js_obj);
     Context* context = func->context();
     ZoneScope zscope(DELETE_ON_EXIT);
-    Object* scope_info = context->closure()->shared()->scope_info();
-    ScopeInfo<ZoneListAllocationPolicy> zone_scope_info(scope_info);
+    SerializedScopeInfo* serialized_scope_info =
+        context->closure()->shared()->scope_info();
+    ScopeInfo<ZoneListAllocationPolicy> zone_scope_info(serialized_scope_info);
     int locals_number = zone_scope_info.NumberOfLocals();
     for (int i = 0; i < locals_number; ++i) {
       String* local_name = *zone_scope_info.LocalName(i);
-      int idx = ScopeInfo<>::ContextSlotIndex(scope_info, local_name, NULL);
+      int idx = serialized_scope_info->ContextSlotIndex(local_name, NULL);
       if (idx >= 0 && idx < context->length()) {
         snapshot_->SetClosureReference(entry, local_name, context->get(idx));
       }