Added authorized install with a script to do the copy.

chrome/installer/mac/app/copy_to_disk.sh

Index: chrome/installer/mac/app/copy_to_disk.sh
diff --git a/chrome/installer/mac/app/copy_to_disk.sh b/chrome/installer/mac/app/copy_to_disk.sh
new file mode 100755
index 0000000000000000000000000000000000000000..89c881ca34eb2558674ba0815e7e2794d374724e
--- /dev/null
+++ b/chrome/installer/mac/app/copy_to_disk.sh
@@ -0,0 +1,41 @@
+#!/bin/sh -p
+
+# Copyright 2016 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.
+
+# This script will be called by the installer application to copy Google
+# Chrome.app into the proper /Applications folder. This script may run as root.
+#
+# When running as root, this script will be invoked with the real user ID set
+# to the user's ID, but the effective user ID set to 0 (root).  bash -p is
+# used on the first line to prevent bash from setting the effective user ID to
+# the real user ID (dropping root privileges).
+
+# The 'e' flag causes the script to terminate if it comes across an error while
+# running. The 'u' flag will raise an error if a variable isn't set.
+# 'u pipefail' will set the return exit code to the last non-zero  error code.
+set -euo pipefail
+
+# Waits for the main app to pass the path to the app bundle inside the mounted
+# disk image.
+read -r SRC
+
+DEST="${1}"
+APPBUNDLENAME=$(basename "${SRC}")
+FULL_DEST="${DEST}"/"${APPBUNDLENAME}"
+
+# Starts the copy
+# The 'l' flag tells rsync to copy symlinks as symlinks. 'r' is for recursive,
+# so copy all files, 'p' is to preserve permisisons. 't' is to preserve times.
+# 'q' is for quiet mode so rynsc will only log to console if an error occurs.
+rsync -lrptq "${SRC}" "${DEST}"
+
+# If this script is run as root, change ownership to root and set elevated
+# permissions.
+if [ "${EUID}" -eq 0 ] ; then
+  chown -Rh root:admin "${FULL_DEST}"
+  chmod -R a+rX,ug+w,o-w  "${FULL_DEST}"
+fi
+
+exit 0