chromeos: Move audio, power, and UI files into subdirs.

This moves more files from chrome/browser/chromeos/ into
subdirectories.

BUG=chromium-os:22896
TEST=did chrome os builds both with and without aura
TBR=sky

Review URL: http://codereview.chromium.org/9125006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@116746 0039d316-1c4b-4281-b951-d872f2087c98
void AudioMixerAlsa::RegisterPrefs(PrefService* local_state) {
  if (!local_state->FindPreference(prefs::kAudioVolume))
    local_state->RegisterDoublePref(prefs::kAudioVolume,
                                    kDefaultVolumeDb,
                                    PrefService::UNSYNCABLE_PREF);
  if (!local_state->FindPreference(prefs::kAudioMute))
    local_state->RegisterIntegerPref(prefs::kAudioMute,
                                     kPrefMuteOff,
                                     PrefService::UNSYNCABLE_PREF);
}

void AudioMixerAlsa::RegisterPrefs(PrefService* local_state) {
  if (!local_state->FindPreference(prefs::kAudioVolume))
    local_state->RegisterDoublePref(prefs::kAudioVolume,
                                    kDefaultVolumeDb,
                                    PrefService::UNSYNCABLE_PREF);
  if (!local_state->FindPreference(prefs::kAudioMute))
    local_state->RegisterIntegerPref(prefs::kAudioMute,
                                     kPrefMuteOff,
                                     PrefService::UNSYNCABLE_PREF);
}
