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

src/platform/window_manager/window_manager.cc

 // 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.
 
 #include "window_manager/window_manager.h"
 
 #include <cerrno>
 #include <cstdio>
 #include <cstdlib>
 #include <cstring>
@@ skipping 35 matching lines @@
               "/usr/bin/screenshot",
               "Path to the screenshot binary");
 DEFINE_string(wm_screenshot_output_dir,
               ".", "Output directory for screenshots");
 DEFINE_string(wm_increase_volume_command,
               "/usr/bin/amixer -- sset Master unmute 5%+",
               "Command to increase audio volume");
 DEFINE_string(wm_decrease_volume_command,
               "/usr/bin/amixer -- sset Master unmute 5%-",
               "Command to decrease audio volume");
+DEFINE_string(wm_mute_audio_command,
+              "/usr/bin/amixer -- sset Master mute",
+              "Command to mute audio");
 DEFINE_string(wm_initial_chrome_window_mapped_file,
               "", "When we first see a toplevel Chrome window get mapped, "
               "we write its ID as an ASCII decimal number to this file.  "
               "Tests can watch for the file to know when the user is fully "
               "logged in.  Leave empty to disable.");
 
 DEFINE_bool(wm_use_compositing, true, "Use compositing");
 
 using std::list;
 using std::make_pair;
@@ skipping 724 matching lines @@
   key_bindings_->AddBinding(
       KeyBindings::KeyCombo(XF86XK_AudioRaiseVolume), "increase-audio-volume");
 
   key_bindings_->AddAction(
       "decrease-audio-volume",
       NewPermanentCallback(
           this, &WindowManager::RunCommand, FLAGS_wm_decrease_volume_command),
       NULL, NULL);
   key_bindings_->AddBinding(
       KeyBindings::KeyCombo(XF86XK_AudioLowerVolume), "decrease-audio-volume");
+
+  key_bindings_->AddAction(
+      "mute-audio",
+      NewPermanentCallback(
+          this, &WindowManager::RunCommand, FLAGS_wm_mute_audio_command),
+      NULL, NULL);
+  key_bindings_->AddBinding(
+      KeyBindings::KeyCombo(XF86XK_AudioMute), "mute-audio");
 }
 
 bool WindowManager::ManageExistingWindows() {
   vector<XWindow> windows;
   if (!xconn_->GetChildWindows(root_, &windows)) {
     return false;
   }
 
   // Panel content windows that are already mapped.  We defer calling
   // HandleMappedWindow() on these until we've handled all other windows to
@@ skipping 842 matching lines @@
   // TODO: Display the message onscreen.
 }
 
 void WindowManager::QueryKeyboardState() {
   vector<uint8_t> keycodes;
   xconn_->QueryKeyboardState(&keycodes);
   hotkey_overlay_->HandleKeyboardState(keycodes);
 }
 
 }  // namespace window_manager