[Copyright] Fix copyright headers in Chromium.

This CL updates copyright headers in /chrome
to the current format:

// Copyright $year The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

Generated with:

./tools/git/mffr.py -g "*.cc" -g "*.h" -g "*.mm" -g "*.py" -g "*.js" -g "*.java" -g "*.mojom" -g "*.xml" -g "*.jinja" -g "*.gn" -g "*.gni" -g "*.star" -g "*.icon" -g "*.ts" -g "*.css" -g "*.json" -g "*.html" -g "*.proto" -g "*.idl" -g "*.pins" -g "*.yml" -g "*.sh" 'Chromium Authors\. All rights reserved\.' 'Chromium Authors'

Additional manual fixes were made to files that have extra "(C)"
strings, or where line breaks were wrong.

This CL was uploaded by git cl split.

R=dtrainor@chromium.org, fhorschig@chromium.org, nemco@google.com, ortuno@chromium.org, sinansahin@google.com

AX-Relnotes: n/a
Bug: 1457007
Change-Id: Ibc152e97ec240f1be47b77087bdcfdad01bbdbfe
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4823717
Auto-Submit: Mark Foltz <mfoltz@chromium.org>
Reviewed-by: David Trainor <dtrainor@chromium.org>
Reviewed-by: Giovanni Ortuno Urquidi <ortuno@chromium.org>
Reviewed-by: Friedrich Horschig <fhorschig@chromium.org>
Commit-Queue: Mark Foltz <mfoltz@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1190274}