Revert of arc-bridge: Move most methods to Mojo interfaces

components/arc/common/power.mojom

-// Copyright 2015 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.
-
-module arc;
-
-// Enumerates the types of wake lock the ARC instance can request from the
-// host.
-enum DisplayWakeLockType {
-  // Does not allow the screen to dim, turn off, or lock; prevents
-  // idle suspend.
-  BRIGHT = 0,
-
-  // Allows dimming the screen, but prevents it from turning off or locking.
-  // Also prevents idle suspend.
-  DIM = 1
-};
-
-interface PowerHost {
-  // Acquire and release wake locks on the host side.
-  OnAcquireDisplayWakeLock(DisplayWakeLockType type);
-  OnReleaseDisplayWakeLock(DisplayWakeLockType type);
-};
-
-interface PowerInstance {
-  // Establishes full-duplex communication with the host.
-  Init(PowerHost host_ptr);
-};