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
LowBatteryObserver::LowBatteryObserver(Profile* profile)
  : notification_(profile, "battery.chromeos",
                  IDR_NOTIFICATION_LOW_BATTERY,
                  l10n_util::GetStringUTF16(IDS_LOW_BATTERY_TITLE)),
    remaining_(0) {}

LowBatteryObserver::LowBatteryObserver(Profile* profile)
  : notification_(profile, "battery.chromeos",
                  IDR_NOTIFICATION_LOW_BATTERY,
                  l10n_util::GetStringUTF16(IDS_LOW_BATTERY_TITLE)),
    remaining_(0) {}
