Updated to Chrome 45 (2454) moved from SVN to git.

core/events/PromiseRejectionEvent.idl

Index: core/events/PromiseRejectionEvent.idl
diff --git a/core/events/PromiseRejectionEvent.idl b/core/events/PromiseRejectionEvent.idl
new file mode 100644
index 0000000000000000000000000000000000000000..85ebeec12dedbaf42aff3a662f38ad05b5bcff75
--- /dev/null
+++ b/core/events/PromiseRejectionEvent.idl
@@ -0,0 +1,16 @@
+// Copyright 2015 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/domenic/unhandled-rejections-browser-spec
+
+[
+    RuntimeEnabled=PromiseRejectionEvent,
+    Custom=VisitDOMWrapper,
+    Constructor(DOMString type, optional PromiseRejectionEventInit eventInitDict),
+    ConstructorCallWith=ScriptState,
+    Exposed=(Window,Worker,ServiceWorker),
+] interface PromiseRejectionEvent : Event {
+    [Custom=Getter] readonly attribute Promise<any>? promise;
+    [CallWith=ScriptState] readonly attribute any reason;
+};