Dart: Remove error message from handle finalizer.

mojo/public/platform/dart/mojo_natives.cc

 // Copyright 2014 The Chromium 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 <stdio.h>
 #include <string.h>
 
 #include <memory>
 #include <vector>
 
@@ skipping 109 matching lines @@
 struct CloserCallbackPeer {
   MojoHandle handle;
 };
 
 static void MojoHandleCloserCallback(void* isolate_data,
                                      Dart_WeakPersistentHandle handle,
                                      void* peer) {
   CloserCallbackPeer* callback_peer =
       reinterpret_cast<CloserCallbackPeer*>(peer);
   if (callback_peer->handle != MOJO_HANDLE_INVALID) {
-    MojoResult res = MojoClose(callback_peer->handle);
-    if (res == MOJO_RESULT_OK) {
-      // If this finalizer callback successfully closes a handle, it means that
-      // the handle has leaked from the Dart code, which is an error.
-      MOJO_LOG(ERROR) << "Handle Finalizer closing handle:\n\tisolate: "
-                      << "\n\thandle: " << callback_peer->handle;
-    }
+    MojoClose(callback_peer->handle);
   }
   delete callback_peer;
 }
 
 // Setup a weak persistent handle for a MojoHandle that calls MojoClose on the
 // handle when the MojoHandle is GC'd or the VM is going down.
 void MojoHandle_RegisterFinalizer(Dart_NativeArguments arguments) {
   Dart_Handle mojo_handle_instance = Dart_GetNativeArgument(arguments, 0);
   if (!Dart_IsInstance(mojo_handle_instance)) {
     SetInvalidArgumentReturn(arguments);
@@ skipping 869 matching lines @@
   mojo_control_handle = control_handle;
   Dart_SetIntegerReturnValue(arguments, static_cast<int64_t>(MOJO_RESULT_OK));
 }
 
 void MojoHandleWatcher_GetControlHandle(Dart_NativeArguments arguments) {
   Dart_SetIntegerReturnValue(arguments, mojo_control_handle);
 }
 
 }  // namespace dart
 }  // namespace mojo