[builtins] Refactor the remaining Date builtins.

src/objects.h

 // Copyright 2015 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 7557 matching lines @@
 
   DECLARE_CAST(JSDate)
 
   // Returns the time value (UTC) identifying the current time.
   static double CurrentTimeValue(Isolate* isolate);
 
   // Returns the date field with the specified index.
   // See FieldIndex for the list of date fields.
   static Object* GetField(Object* date, Smi* index);
 
+  static Handle<Object> SetValue(Handle<JSDate> date, double v);
+
   void SetValue(Object* value, bool is_value_nan);
 
   // ES6 section 20.3.4.45 Date.prototype [ @@toPrimitive ]
   static MUST_USE_RESULT MaybeHandle<Object> ToPrimitive(
       Handle<JSReceiver> receiver, Handle<Object> hint);
 
   // Dispatched behavior.
   DECLARE_PRINTER(JSDate)
   DECLARE_VERIFIER(JSDate)
 
@@ skipping 3149 matching lines @@
     }
     return value;
   }
 };
 
 
 }  // NOLINT, false-positive due to second-order macros.
 }  // NOLINT, false-positive due to second-order macros.
 
 #endif  // V8_OBJECTS_H_