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 SystemKeyEventListener::OnVolumeMute() {
  AudioHandler* audio_handler = GetAudioHandler();
  if (!audio_handler)
    return;

  audio_handler->SetMuted(true);

  SendAccessibilityVolumeNotification(
      audio_handler->GetVolumePercent(),
      audio_handler->IsMuted());

  ShowVolumeBubble();
}

void SystemKeyEventListener::OnVolumeMute() {
  AudioHandler* audio_handler = GetAudioHandler();
  if (!audio_handler)
    return;

  audio_handler->SetMuted(true);

  SendAccessibilityVolumeNotification(
      audio_handler->GetVolumePercent(),
      audio_handler->IsMuted());

  ShowVolumeBubble();
}
