Update copyright headers in chromecast/

The methodology used to generate this CL is documented in
https://crbug.com/1098010#c34.

No-Try: true
Bug: 1098010
Change-Id: If6e1785c4bcaeae4c631a4ed6f6fd9e3145a208d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3888259
Auto-Submit: Avi Drissman <[email protected]>
Owners-Override: Avi Drissman <[email protected]>
Reviewed-by: Mark Mentovai <[email protected]>
Commit-Queue: Mark Mentovai <[email protected]>
Cr-Commit-Position: refs/heads/main@{#1045947}
diff --git a/chromecast/browser/pref_service_helper.h b/chromecast/browser/pref_service_helper.h
index d1dabcc9..accbcce 100644
--- a/chromecast/browser/pref_service_helper.h
+++ b/chromecast/browser/pref_service_helper.h
@@ -1,4 +1,4 @@
-// Copyright 2014 The Chromium Authors. All rights reserved.
+// Copyright 2014 The Chromium Authors
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 //