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| 1 // Copyright 2016 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 #include "chrome/browser/engagement/site_engagement_observer.h" |
| 6 |
| 7 #include "chrome/browser/engagement/site_engagement_service.h" |
| 8 |
| 9 SiteEngagementObserver::SiteEngagementObserver(SiteEngagementService* service) |
| 10 : service_(nullptr) { |
| 11 Observe(service); |
| 12 } |
| 13 |
| 14 SiteEngagementObserver::SiteEngagementObserver() : service_(nullptr) {} |
| 15 |
| 16 SiteEngagementObserver::~SiteEngagementObserver() { |
| 17 if (service_) |
| 18 service_->RemoveObserver(this); |
| 19 } |
| 20 |
| 21 SiteEngagementService* SiteEngagementObserver::GetSiteEngagementService() |
| 22 const { |
| 23 return service_; |
| 24 } |
| 25 |
| 26 void SiteEngagementObserver::Observe(SiteEngagementService* service) { |
| 27 if (service == service_) |
| 28 return; |
| 29 |
| 30 if (service_) |
| 31 service_->RemoveObserver(this); |
| 32 |
| 33 service_ = service; |
| 34 if (service_) |
| 35 service->AddObserver(this); |
| 36 } |
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