Use the return value of vm native methods to set the return value,

vm/code_generator.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/code_generator.h"
 
 #include "vm/assembler_macros.h"
 #include "vm/ast.h"
 #include "vm/code_patcher.h"
 #include "vm/compiler.h"
@@ skipping 774 matching lines @@
 //   Returns: RawCode object or NULL (method not found or not compileable).
 // This is called by the megamorphic stub when instance call does not need to be
 // patched.
 // Used by megamorphic lookup/no-such-method-handling.
 DEFINE_RUNTIME_ENTRY(ResolveCompileInstanceFunction, 1) {
   ASSERT(arguments.Count() ==
          kResolveCompileInstanceFunctionRuntimeEntry.argument_count());
   const Instance& receiver = Instance::CheckedHandle(arguments.At(0));
   const Code& code = Code::Handle(
       ResolveCompileInstanceCallTarget(isolate, receiver));
-  arguments.SetReturn(Code::Handle(code.raw()));
+  arguments.SetReturn(code);
 }
 
 
 // Gets called from debug stub when code reaches a breakpoint.
 //   Arg0: function object of the static function that was about to be called.
 DEFINE_RUNTIME_ENTRY(BreakpointStaticHandler, 1) {
   ASSERT(arguments.Count() ==
       kBreakpointStaticHandlerRuntimeEntry.argument_count());
   ASSERT(isolate->debugger() != NULL);
   isolate->debugger()->SignalBpReached();
@@ skipping 801 matching lines @@
   function.set_usage_counter(0);
   function.set_deoptimization_counter(function.deoptimization_counter() + 1);
 
   if (function.HasOptimizedCode()) {
     function.SwitchToUnoptimizedCode();
   }
 }
 END_LEAF_RUNTIME_ENTRY
 
 }  // namespace dart