[builtins] De-duplicate specification of array builtin parameter count

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 58 matching lines @@
   Code* builtin(Name name) {
     // Code::cast cannot be used here since we access builtins
     // during the marking phase of mark sweep. See IC::Clear.
     return reinterpret_cast<Code*>(builtins_[name]);
   }
 
   Address builtin_address(Name name) {
     return reinterpret_cast<Address>(&builtins_[name]);
   }
 
+  static int GetBuiltinParameterCount(Name name);
+
   static Callable CallableFor(Isolate* isolate, Name name);
 
   static const char* name(int index);
 
   // 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);
@@ skipping 62 matching lines @@
   friend class Isolate;
   friend class SetupIsolateDelegate;
 
   DISALLOW_COPY_AND_ASSIGN(Builtins);
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_BUILTINS_BUILTINS_H_