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| 1 // Copyright 2015 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/page_load_metrics/observers/stale_while_revalidate_metr
ics_observer.h" |
| 6 |
| 7 #include "components/page_load_metrics/browser/page_load_metrics_macros.h" |
| 8 #include "components/page_load_metrics/common/page_load_timing.h" |
| 9 #include "net/base/swr_histogram_domains/swr_histogram_domains.h" |
| 10 |
| 11 StaleWhileRevalidateMetricsObserver::StaleWhileRevalidateMetricsObserver( |
| 12 page_load_metrics::PageLoadMetricsObservable* metrics) |
| 13 : is_interesting_domain_(false), metrics_(metrics) {} |
| 14 |
| 15 void StaleWhileRevalidateMetricsObserver::OnCommit( |
| 16 content::NavigationHandle* navigation_handle) { |
| 17 is_interesting_domain_ = |
| 18 net::swr_histogram_domains::IsHostInSWRHistogramDomain( |
| 19 navigation_handle->GetURL().host()); |
| 20 } |
| 21 |
| 22 void StaleWhileRevalidateMetricsObserver::OnComplete( |
| 23 const page_load_metrics::PageLoadTiming& timing, |
| 24 const page_load_metrics::PageLoadExtraInfo& extra_info) { |
| 25 if (!is_interesting_domain_) |
| 26 return; |
| 27 |
| 28 if (!timing.load_event_start.is_zero()) { |
| 29 PAGE_LOAD_HISTOGRAM( |
| 30 "PageLoad.Clients.StaleWhileRevalidateExperiment.Timing2." |
| 31 "NavigationToLoadEventFired", |
| 32 timing.load_event_start); |
| 33 } |
| 34 if (!timing.first_layout.is_zero()) { |
| 35 PAGE_LOAD_HISTOGRAM( |
| 36 "PageLoad.Clients.StaleWhileRevalidateExperiment.Timing2." |
| 37 "NavigationToFirstLayout", |
| 38 timing.first_layout); |
| 39 } |
| 40 if (!timing.first_text_paint.is_zero()) { |
| 41 PAGE_LOAD_HISTOGRAM( |
| 42 "PageLoad.Clients.StaleWhileRevalidateExperiment.Timing2." |
| 43 "NavigationToFirstTextPaint", |
| 44 timing.first_text_paint); |
| 45 } |
| 46 } |
| 47 |
| 48 void StaleWhileRevalidateMetricsObserver::OnPageLoadMetricsGoingAway() { |
| 49 metrics_->RemoveObserver(this); |
| 50 delete this; |
| 51 } |
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