Roll IDL to Dartium37 (r181268)

modules/navigatorcontentutils/testing/InternalsNavigatorContentUtils.idl

Index: modules/navigatorcontentutils/testing/InternalsNavigatorContentUtils.idl
diff --git a/core/animation/DocumentAnimation.idl b/modules/navigatorcontentutils/testing/InternalsNavigatorContentUtils.idl
similarity index 60%
copy from core/animation/DocumentAnimation.idl
copy to modules/navigatorcontentutils/testing/InternalsNavigatorContentUtils.idl
index 2bfb6a74b00d388c5f585b10f2d56950155c2458..0d43a955a5bec91694d52a0bb8633874418c8cfb 100644
--- a/core/animation/DocumentAnimation.idl
+++ b/modules/navigatorcontentutils/testing/InternalsNavigatorContentUtils.idl
@@ -2,8 +2,6 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-[
-    RuntimeEnabled=WebAnimationsAPI,
-] partial interface Document {
-    readonly attribute Timeline timeline;
+partial interface Internals {
+    void setNavigatorContentUtilsClientMock(Document document);
 };