Added mute key handling to the WM. Also removed ACPI hotkey handler

src/platform/acpi/action_hotkey.sh

Index: src/platform/acpi/action_hotkey.sh
diff --git a/src/platform/acpi/action_hotkey.sh b/src/platform/acpi/action_hotkey.sh
deleted file mode 100755
index 3ca6a870a0b8e7e2c5c0e446cee9425d0efd9550..0000000000000000000000000000000000000000
--- a/src/platform/acpi/action_hotkey.sh
+++ /dev/null
@@ -1,31 +0,0 @@
-#!/bin/sh
-
-# Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
-
-# TODO: This is specific to eeepc. Figure out a way to generalize and
-# add support for additional hotkeys.
-#
-# TODO(ajwong): Find a better way to talk to pulseaudio than changing to the
-# chronos user and talking to pulseaudio via amixer.
-
-USER_ID="$(/usr/bin/id -u chronos)"
-MINIJAIL_FLAGS="--use-capabilities"
-
-export PULSE_RUNTIME_PATH=/var/run/pulse
-
-case "$3" in
-  00000013)  # Toggle sound
-        /sbin/minijail ${MINIJAIL_FLAGS} --uid=${USER_ID} -- \
-            /usr/bin/amixer set Master toggle
-        ;;
-  00000014)  # Decrease volume
-        /sbin/minijail ${MINIJAIL_FLAGS} --uid=${USER_ID} -- \
-            /usr/bin/amixer set Master 5%-
-        ;;
-  00000015)  # Increase volume
-        /sbin/minijail ${MINIJAIL_FLAGS} --uid=${USER_ID} -- \
-            /usr/bin/amixer set Master 5%+
-        ;;
-esac