Device Service: Decouple Wake Lock from //content

device/wake_lock/wake_lock_service_impl.cc

 // 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.
 
 #include "device/wake_lock/wake_lock_service_impl.h"
 
 #include <utility>
 
 #include "device/wake_lock/wake_lock_service_context.h"
 
 namespace device {
 
-WakeLockServiceImpl::WakeLockServiceImpl(
-    base::WeakPtr<WakeLockServiceContext> context)
+WakeLockServiceImpl::WakeLockServiceImpl(WakeLockServiceContext* context)
     : context_(context), wake_lock_request_outstanding_(false) {}
 
 WakeLockServiceImpl::~WakeLockServiceImpl() {
   CancelWakeLock();
 }
 
 void WakeLockServiceImpl::RequestWakeLock() {
-  if (!context_ || wake_lock_request_outstanding_)
+  if (wake_lock_request_outstanding_)
     return;
 
   wake_lock_request_outstanding_ = true;
   context_->RequestWakeLock();
 }
 
 void WakeLockServiceImpl::CancelWakeLock() {
-  if (!context_ || !wake_lock_request_outstanding_)
+  if (!wake_lock_request_outstanding_)
     return;
 
   wake_lock_request_outstanding_ = false;
   context_->CancelWakeLock();
 }
 
 }  // namespace device