Add service unittest for WakeLockServiceImpl.

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 "base/memory/ptr_util.h"
 
@@ skipping 35 matching lines @@
 }  // namespace
 
 WakeLockServiceImpl::WakeLockServiceImpl(
     mojom::WakeLockServiceRequest request,
     mojom::WakeLockType type,
     mojom::WakeLockReason reason,
     const std::string& description,
     int context_id,
     WakeLockContextCallback native_view_getter,
     scoped_refptr<base::SingleThreadTaskRunner> file_task_runner)
-    : type_(type),
+    : num_lock_requests_(0),
+      type_(type),
       reason_(reason),
       description_(base::MakeUnique<std::string>(description)),
-      num_lock_requests_(0),
 #if defined(OS_ANDROID)
       context_id_(context_id),
       native_view_getter_(native_view_getter),
 #endif
       main_task_runner_(base::ThreadTaskRunnerHandle::Get()),
       file_task_runner_(std::move(file_task_runner)) {
   AddClient(std::move(request));
   binding_set_.set_connection_error_handler(base::Bind(
       &WakeLockServiceImpl::OnConnectionError, base::Unretained(this)));
 }
@@ skipping 86 matching lines @@
   if (*binding_set_.dispatch_context() && num_lock_requests_ > 0) {
     num_lock_requests_--;
     UpdateWakeLock();
   }
 
   if (binding_set_.empty())
     base::ThreadTaskRunnerHandle::Get()->DeleteSoon(FROM_HERE, this);
 }
 
 }  // namespace device