Switch Audio Preferences to per device.

chrome/common/pref_names.cc

 // Copyright (c) 2012 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.
 
 #include "chrome/common/pref_names.h"
 
 #include "base/basictypes.h"
 #include "chrome/common/pref_font_webkit_names.h"
 
 namespace prefs {
@@ skipping 523 matching lines @@
 // the profile is opened, the process will continue from where it left off.
 //
 // See possible values in external_provider_impl.cc.
 const char kDefaultAppsInstallState[] = "default_apps_install_state";
 
 // A boolean pref set to true if the Chrome Web Store icons should be hidden
 // from the New Tab Page and app launcher.
 const char kHideWebStoreIcon[] = "hide_web_store_icon";
 
 #if defined(OS_CHROMEOS)
+// A dictionary pref to hold the mute setting for all the currently known
+// audio devices.
+const char kAudioDevicesMute[] = "settings.audio.devices.mute";
+
+// A dictionary pref storing the volume settings for all the currently known
+// audio devices.
+const char kAudioDevicesVolumePercent[] =
+    "settings.audio.devices.volume_percent";
+
 // An integer pref to initially mute volume if 1. This pref is ignored if
 // |kAudioOutputAllowed| is set to false, but its value is preserved, therefore
-// when the policy is lifted the original mute state is restored.
+// when the policy is lifted the original mute state is restored.  This setting
+// is here only for migration purposes now. It is being replaced by the
+// |kAudioDevicesMute| setting.
 const char kAudioMute[] = "settings.audio.mute";
 
-// A double pref storing the user-requested volume.
+// A double pref storing the user-requested volume. This setting is here only
+// for migration purposes now. It is being replaced by the
+// |kAudioDevicesVolumePercent| setting.
 const char kAudioVolumePercent[] = "settings.audio.volume_percent";
 
 // A boolean pref set to true if touchpad tap-to-click is enabled.
 const char kTapToClickEnabled[] = "settings.touchpad.enable_tap_to_click";
 
 // A boolean pref set to true if touchpad tap-dragging is enabled.
 const char kTapDraggingEnabled[] = "settings.touchpad.enable_tap_dragging";
 
 // A boolean pref set to true if touchpad three-finger-click is enabled.
 const char kEnableTouchpadThreeFingerClick[] =
@@ skipping 1881 matching lines @@
 // ping and the time of the last ping.
 extern const char kAppListAppLaunchCount[] = "app_list.app_launch_count";
 extern const char kLastAppListAppLaunchPing[] = "app_list.last_app_launch_ping";
 
 // A string pref for storing the salt used to compute the pepper device ID.
 const char kDRMSalt[] = "settings.privacy.drm_salt";
 // A boolean pref that enables the (private) pepper GetDeviceID() call.
 const char kEnableDRM[] = "settings.privacy.drm_enabled";
 
 }  // namespace prefs