Add OfflineAudioDestinationNode

third_party/WebKit/Source/modules/webaudio/OfflineAudioDestinationNode.idl

Index: third_party/WebKit/Source/modules/webaudio/OfflineAudioDestinationNode.idl
diff --git a/services/shell/background/tests/test.mojom b/third_party/WebKit/Source/modules/webaudio/OfflineAudioDestinationNode.idl
similarity index 73%
copy from services/shell/background/tests/test.mojom
copy to third_party/WebKit/Source/modules/webaudio/OfflineAudioDestinationNode.idl
index 18a92ec2634bed55b4048f5ece0e83b36f0c7b8f..4f701ccc3c7a219c9a944d3c93c9181f4eeab534 100644
--- a/services/shell/background/tests/test.mojom
+++ b/third_party/WebKit/Source/modules/webaudio/OfflineAudioDestinationNode.idl
@@ -2,8 +2,5 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-module shell.mojom;
-
-interface TestService {
-  Test() => ();
+interface OfflineAudioDestinationNode: AudioDestinationNode {
 };