Spelling corrections to the API header file

runtime/vm/dart_api_impl.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 "vm/bigint_operations.h"
 #include "vm/class_finalizer.h"
 #include "vm/compiler.h"
 #include "vm/dart.h"
@@ skipping 672 matching lines @@
   MessageWriter writer(&buffer, &allocator);
 
   writer.WriteMessage(len, data);
 
   // Post the message at the given port.
   return PortMap::PostMessage(new Message(
       port_id, Message::kIllegalPort, buffer, Message::kNormalPriority));
 }
 
 
-DART_EXPORT bool Dart_PostCObject(Dart_Port port_id, Dart_CObject* root) {
+DART_EXPORT bool Dart_PostCObject(Dart_Port port_id, Dart_CObject* message) {
   uint8_t* buffer = NULL;
   MessageWriter writer(&buffer, allocator);
 
-  writer.WriteCMessage(root);
+  writer.WriteCMessage(message);
 
   // Post the message at the given port.
   return PortMap::PostMessage(new Message(
       port_id, Message::kIllegalPort, buffer, Message::kNormalPriority));
 }
 
 
 DART_EXPORT bool Dart_Post(Dart_Port port_id, Dart_Handle handle) {
   Isolate* isolate = Isolate::Current();
   CHECK_ISOLATE(isolate);
@@ skipping 1724 matching lines @@
     }
     delete debug_region;
   } else {
     *buffer = NULL;
     *buffer_size = 0;
   }
 }
 
 
 }  // namespace dart