Move some Runtime:: functions and remove runtime.h as include when unnecessary.

src/runtime/runtime-date.cc

 // Copyright 2014 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.
 
 #include "src/v8.h"
 
 #include "src/arguments.h"
 #include "src/date.h"
 #include "src/dateparser-inl.h"
-#include "src/runtime/runtime.h"
 #include "src/runtime/runtime-utils.h"
 
 namespace v8 {
 namespace internal {
 
 RUNTIME_FUNCTION(Runtime_DateMakeDay) {
   SealHandleScope shs(isolate);
   DCHECK(args.length() == 2);
 
   CONVERT_SMI_ARG_CHECKED(year, 0);
@@ skipping 160 matching lines @@
     THROW_NEW_ERROR_RETURN_FAILURE(
         isolate,
         NewTypeError("not_date_object", HandleVector<Object>(NULL, 0)));
   }
   JSDate* date = JSDate::cast(obj);
   if (index == 0) return date->value();
   return JSDate::GetField(date, Smi::FromInt(index));
 }
 }
 }  // namespace v8::internal