Allow a ParseInfo without a script for %SetCode users

src/parsing/parse-info.h

 // Copyright 2016 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_PARSING_PARSE_INFO_H_
 #define V8_PARSING_PARSE_INFO_H_
 
 #include <memory>
 
 #include "include/v8.h"
@@ skipping 24 matching lines @@
  public:
   explicit ParseInfo(AccountingAllocator* zone_allocator);
   ParseInfo(Handle<Script> script);
   ParseInfo(Handle<SharedFunctionInfo> shared);
 
   // TODO(rmcilroy): Remove once Hydrogen no longer needs this.
   ParseInfo(Handle<SharedFunctionInfo> shared, std::shared_ptr<Zone> zone);
 
   ~ParseInfo();
 
+  static ParseInfo* AllocateWithoutScript(Handle<SharedFunctionInfo> shared);
+
   Zone* zone() const { return zone_.get(); }
 
   std::shared_ptr<Zone> zone_shared() const { return zone_; }
 
   void set_deferred_handles(std::shared_ptr<DeferredHandles> deferred_handles);
   void set_deferred_handles(DeferredHandles* deferred_handles);
   std::shared_ptr<DeferredHandles> deferred_handles() const {
     return deferred_handles_;
   }
 
@@ skipping 226 matching lines @@
 
   void SetFlag(Flag f) { flags_ |= f; }
   void SetFlag(Flag f, bool v) { flags_ = v ? flags_ | f : flags_ & ~f; }
   bool GetFlag(Flag f) const { return (flags_ & f) != 0; }
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_PARSING_PARSE_INFO_H_