Decode the Dart message into a Dart_CMessage structure before calling the native port callback

runtime/vm/dart_api_impl_test.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 "include/dart_api.h"
 #include "platform/assert.h"
 #include "platform/utils.h"
 #include "vm/dart_api_impl.h"
 #include "vm/dart_api_state.h"
 #include "vm/thread.h"
@@ skipping 2871 matching lines @@
                              Dart_NewString(""),
                              Dart_NewString("main"),
                              0,
                              NULL);
   EXPECT_VALID(result);
 }
 
 
 void NewNativePort_send123(Dart_Port dest_port_id,
                            Dart_Port reply_port_id,
-                           uint8_t* data) {
+                           Dart_CMessage* message) {
+  // Gets a null message.
+  EXPECT_NOTNULL(message);
+  EXPECT_EQ(Dart_CObject::kNull, message->root->type);
+
   intptr_t response = 123;
   Dart_PostIntArray(reply_port_id, 1, &response);
 }
 
 
 void NewNativePort_send321(Dart_Port dest_port_id,
                            Dart_Port reply_port_id,
-                           uint8_t* data) {
+                           Dart_CMessage* message) {
+  // Gets a null message.
+  EXPECT_NOTNULL(message);
+  EXPECT_EQ(Dart_CObject::kNull, message->root->type);
+
   intptr_t response = 321;
   Dart_PostIntArray(reply_port_id, 1, &response);
 }
 
 
 UNIT_TEST_CASE(NewNativePort) {
   // Create a port with a bogus handler.
   Dart_Port error_port = Dart_NewNativePort("Foo", NULL, true);
   EXPECT_EQ(kIllegalPort, error_port);
 
@@ skipping 306 matching lines @@
   // We should have received the expected number of interrupts.
   EXPECT_EQ(kInterruptCount, interrupt_count);
 
   // Give the spawned thread enough time to properly exit.
   Isolate::SetInterruptCallback(saved);
 }
 
 #endif  // defined(TARGET_ARCH_IA32) || defined(TARGET_ARCH_X64).
 
 }  // namespace dart