Revert of Always deserialize scope infos for parsing

src/isolate.cc

Index: src/isolate.cc
diff --git a/src/isolate.cc b/src/isolate.cc
index c7c122fdcd2e2ccd0568fc14ac6ae55771930bbd..5876af004fc56d7be5cccb9e1d9b360e43c71f20 100644
--- a/src/isolate.cc
+++ b/src/isolate.cc
@@ -9,6 +9,7 @@
 #include <fstream>  // NOLINT(readability/streams)
 #include <sstream>
 
+#include "src/ast/context-slot-cache.h"
 #include "src/base/accounting-allocator.h"
 #include "src/base/hashmap.h"
 #include "src/base/platform/platform.h"
@@ -1943,6 +1944,7 @@
       stack_trace_for_uncaught_exceptions_frame_limit_(0),
       stack_trace_for_uncaught_exceptions_options_(StackTrace::kOverview),
       keyed_lookup_cache_(NULL),
+      context_slot_cache_(NULL),
       descriptor_lookup_cache_(NULL),
       handle_scope_implementer_(NULL),
       unicode_cache_(NULL),
@@ -2170,6 +2172,8 @@
 
   delete descriptor_lookup_cache_;
   descriptor_lookup_cache_ = NULL;
+  delete context_slot_cache_;
+  context_slot_cache_ = NULL;
   delete keyed_lookup_cache_;
   keyed_lookup_cache_ = NULL;
 
@@ -2320,6 +2324,7 @@
 
   compilation_cache_ = new CompilationCache(this);
   keyed_lookup_cache_ = new KeyedLookupCache();
+  context_slot_cache_ = new ContextSlotCache();
   descriptor_lookup_cache_ = new DescriptorLookupCache();
   unicode_cache_ = new UnicodeCache();
   inner_pointer_to_code_cache_ = new InnerPointerToCodeCache(this);