[runtime] First step to sanitize regexp literal creation.

src/objects.h

 // Copyright 2012 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_OBJECTS_H_
 #define V8_OBJECTS_H_
 
 #include <iosfwd>
 
 #include "src/allocation.h"
@@ skipping 7697 matching lines @@
     uint32_t value() { return value_; }
    private:
     uint32_t value_;
   };
 
   DECL_ACCESSORS(data, Object)
   DECL_ACCESSORS(flags, Object)
   DECL_ACCESSORS(source, Object)
 
   static MaybeHandle<JSRegExp> New(Handle<String> source, Handle<String> flags);
+  static Handle<JSRegExp> Copy(Handle<JSRegExp> regexp);
 
   static MaybeHandle<JSRegExp> Initialize(Handle<JSRegExp> regexp,
                                           Handle<String> source,
                                           Handle<String> flags_string);
 
   inline Type TypeTag();
   inline int CaptureCount();
   inline Flags GetFlags();
   inline String* Pattern();
   inline Object* DataAt(int index);
@@ skipping 3010 matching lines @@
     }
     return value;
   }
 };
 
 
 }  // NOLINT, false-positive due to second-order macros.
 }  // NOLINT, false-positive due to second-order macros.
 
 #endif  // V8_OBJECTS_H_