[BackgroundSync] Remove BackgroundSyncRegistrationHandle

content/browser/background_sync/background_sync_registration.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 "content/browser/background_sync/background_sync_registration.h"
 
 #include "base/bind.h"
 #include "base/location.h"
 #include "base/logging.h"
 #include "base/single_thread_task_runner.h"
 #include "base/thread_task_runner_handle.h"
 
 namespace content {
 
 const BackgroundSyncRegistration::RegistrationId
     BackgroundSyncRegistration::kInvalidRegistrationId = -1;
 
 const BackgroundSyncRegistration::RegistrationId
     BackgroundSyncRegistration::kInitialId = 0;
 
-BackgroundSyncRegistration::BackgroundSyncRegistration() = default;
-BackgroundSyncRegistration::~BackgroundSyncRegistration() = default;
-
 bool BackgroundSyncRegistration::Equals(
     const BackgroundSyncRegistration& other) const {
   return options_.Equals(other.options_);
 }
 
 bool BackgroundSyncRegistration::IsValid() const {
   return id_ != kInvalidRegistrationId;
 }
 
 bool BackgroundSyncRegistration::IsFiring() const {
   switch (sync_state_) {
     case BackgroundSyncState::FIRING:
     case BackgroundSyncState::REREGISTERED_WHILE_FIRING:
       return true;
     case BackgroundSyncState::PENDING:
       return false;
   }
   NOTREACHED();
   return false;
 }
 
 }  // namespace content