Add groups and users for volume daemon.

This relands CL:218323.

BUG=chromium:370485
TEST=autotest security_AccountsBaseline
CQ-DEPEND=CL:218690

Change-Id: I89fbd3417c9799b505f68b116c38272de7394470
Reviewed-on: https://chromium-review.googlesource.com/218691
Reviewed-by: Jorge Lucangeli Obes <jorgelo@chromium.org>
Commit-Queue: Haixia Shi <hshi@chromium.org>
Tested-by: Haixia Shi <hshi@chromium.org>
diff --git a/profiles/base/accounts/group/audio b/profiles/base/accounts/group/audio
index f907580..6b4e663 100644
--- a/profiles/base/accounts/group/audio
+++ b/profiles/base/accounts/group/audio
@@ -1,3 +1,3 @@
 group:audio
 gid:18
-users:cras,chronos
+users:cras,chronos,volume
diff --git a/profiles/base/accounts/group/uinput b/profiles/base/accounts/group/uinput
new file mode 100644
index 0000000..565b65e
--- /dev/null
+++ b/profiles/base/accounts/group/uinput
@@ -0,0 +1,3 @@
+group:uinput
+gid:258
+users:bluetooth,volume
diff --git a/profiles/base/accounts/group/volume b/profiles/base/accounts/group/volume
new file mode 100644
index 0000000..4d188a0
--- /dev/null
+++ b/profiles/base/accounts/group/volume
@@ -0,0 +1,4 @@
+# Group for Chromium OS volume daemon
+group:volume
+gid:257
+users:
diff --git a/profiles/base/accounts/user/volume b/profiles/base/accounts/user/volume
new file mode 100644
index 0000000..a7147bc
--- /dev/null
+++ b/profiles/base/accounts/user/volume
@@ -0,0 +1,6 @@
+user:volume
+uid:257
+gid:257
+gecos:Chromium OS volume daemon
+home:/dev/null
+shell:/bin/false