Create TaskAttributionTiming PerformanceEntry for attribution in PerformanceLongTaskTiming. Move cu…

third_party/WebKit/Source/core/timing/TaskAttributionTiming.idl

Index: third_party/WebKit/Source/core/timing/TaskAttributionTiming.idl
diff --git a/third_party/WebKit/Source/core/timing/TaskAttributionTiming.idl b/third_party/WebKit/Source/core/timing/TaskAttributionTiming.idl
new file mode 100644
index 0000000000000000000000000000000000000000..5d610947f04da864d5ffa72c1ac69664b1a77328
--- /dev/null
+++ b/third_party/WebKit/Source/core/timing/TaskAttributionTiming.idl
@@ -0,0 +1,12 @@
+// Copyright 2017 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.
+
+// https://github.com/wicg/longtasks
+[
+    OriginTrialEnabled=LongTaskObserver,
+] interface TaskAttributionTiming : PerformanceEntry {
+    readonly attribute DOMString frameSrc;
+    readonly attribute DOMString frameId;
+    readonly attribute DOMString frameName;
+};