[snapshot] full setup delegate should also be able to deserialize.

src/builtins/builtins.h

 // Copyright 2011 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.
 
 #ifndef V8_BUILTINS_BUILTINS_H_
 #define V8_BUILTINS_BUILTINS_H_
 
 #include "src/base/flags.h"
 #include "src/builtins/builtins-definitions.h"
 #include "src/globals.h"
@@ skipping 72 matching lines @@
   // Returns the C++ entry point for builtins implemented in C++, and the null
   // Address otherwise.
   static Address CppEntryOf(int index);
 
   static bool IsCpp(int index);
   static bool IsApi(int index);
   static bool HasCppImplementation(int index);
 
   bool is_initialized() const { return initialized_; }
 
+  // Used by SetupIsolateDelegate and Deserializer.
+  void MarkInitialized() {
+    DCHECK(!initialized_);
+    initialized_ = true;
+  }
+
   MUST_USE_RESULT static MaybeHandle<Object> InvokeApiFunction(
       Isolate* isolate, bool is_construct, Handle<HeapObject> function,
       Handle<Object> receiver, int argc, Handle<Object> args[],
       Handle<HeapObject> new_target);
 
   enum ExitFrameType { EXIT, BUILTIN_EXIT };
 
   static void Generate_Adaptor(MacroAssembler* masm, Address builtin_address,
                                ExitFrameType exit_frame_type);
 
   static bool AllowDynamicFunction(Isolate* isolate, Handle<JSFunction> target,
                                    Handle<JSObject> target_global_proxy);
 
  private:
   Builtins();
-  // Used by SetupIsolateDelegate.
-  void MarkInitialized() {
-    DCHECK(!initialized_);
-    initialized_ = true;
-  }
 
   static void Generate_CallFunction(MacroAssembler* masm,
                                     ConvertReceiverMode mode,
                                     TailCallMode tail_call_mode);
 
   static void Generate_CallBoundFunctionImpl(MacroAssembler* masm,
                                              TailCallMode tail_call_mode);
 
   static void Generate_Call(MacroAssembler* masm, ConvertReceiverMode mode,
                             TailCallMode tail_call_mode);
@@ skipping 27 matching lines @@
   friend class Isolate;
   friend class SetupIsolateDelegate;
 
   DISALLOW_COPY_AND_ASSIGN(Builtins);
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_BUILTINS_BUILTINS_H_