Add GetWakeLockWithoutContext() in WakeLockContextProvider mojo interface.

device/wake_lock/public/interfaces/wake_lock_context.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 device.mojom;
 
 import "device/wake_lock/public/interfaces/wake_lock_service.mojom";
 
 enum WakeLockType {
     // Prevent the application from being suspended. On some platforms, apps may
@@ skipping 15 matching lines @@
     ReasonAudioPlayback = 0,
     // Video is being played.
     ReasonVideoPlayback = 1,
     // WakeLock for some other reason.
     ReasonOther = 2,
 };
 
 // Context in which WakeLockService instances operate.
 interface WakeLockContext {
   // Gets a WakeLockService within this context.
-  GetWakeLock(WakeLockType type, WakeLockReason reason, string description, WakeLockService& wake_lock);
+  GetWakeLock(WakeLockType type,
+              WakeLockReason reason,
+              string description,
+              WakeLockService& wake_lock);
 };