Move ownership of PowerSaveBlocker from WakeLockServiceContext to WakeLockServiceImpl

device/wake_lock/wake_lock_context_provider.cc

 // Copyright 2017 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_context_provider.h"
 
 #include <utility>
 
 #include "mojo/public/cpp/bindings/strong_binding.h"
 
@@ skipping 13 matching lines @@
     scoped_refptr<base::SingleThreadTaskRunner> file_task_runner,
     const WakeLockContextCallback& native_view_getter)
     : file_task_runner_(std::move(file_task_runner)),
       native_view_getter_(native_view_getter) {}
 
 WakeLockContextProvider::~WakeLockContextProvider() {}
 
 void WakeLockContextProvider::GetContext(
     int context_id,
     mojo::InterfaceRequest<mojom::WakeLockContext> request) {
-  // WakeLockServiceContext owns itself (see the comment on
-  // wake_lock_service_context.h).
-  new WakeLockServiceContext(std::move(request), context_id, file_task_runner_,
-                             native_view_getter_);
+  mojo::MakeStrongBinding(
+      base::MakeUnique<WakeLockServiceContext>(context_id, file_task_runner_,
+                                               native_view_getter_),
+      std::move(request));
 }
 
 }  // namespace device