[builtins] Remove bunch of uses of %_Arguments and %_ArgumentsLength.

src/accessors.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_ACCESSORS_H_
 #define V8_ACCESSORS_H_
 
 #include "include/v8.h"
 #include "src/allocation.h"
 #include "src/globals.h"
@@ skipping 65 matching lines @@
     k##name##Getter, \
     k##name##Setter,
   ACCESSOR_INFO_LIST(ACCESSOR_INFO_DECLARATION)
 #undef ACCESSOR_INFO_DECLARATION
     descriptorCount
   };
 
   // Accessor functions called directly from the runtime system.
   MUST_USE_RESULT static MaybeHandle<Object> FunctionSetPrototype(
       Handle<JSFunction> object, Handle<Object> value);
-  static Handle<Object> FunctionGetArguments(Handle<JSFunction> object);
+  static Handle<JSObject> FunctionGetArguments(Handle<JSFunction> object);
 
   // Accessor infos.
   static Handle<AccessorInfo> MakeModuleExport(
       Handle<String> name, int index, PropertyAttributes attributes);
 
   // Returns true for properties that are accessors to object fields.
   // If true, *object_offset contains offset of object field.
   static bool IsJSObjectFieldAccessor(Handle<Map> map, Handle<Name> name,
                                       int* object_offset);
 
@@ skipping 10 matching lines @@
       Handle<Name> name,
       AccessorNameGetterCallback getter,
       AccessorNameSetterCallback setter,
       PropertyAttributes attributes);
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_ACCESSORS_H_