Deprecate StaleWhileRevalidateMetricsObserver

chrome/browser/page_load_metrics/page_load_metrics_initialize.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 "chrome/browser/page_load_metrics/page_load_metrics_initialize.h"
 
 #include "base/macros.h"
 #include "base/memory/ptr_util.h"
 #include "chrome/browser/page_load_metrics/metrics_web_contents_observer.h"
 #if defined(OS_ANDROID)
 #include "chrome/browser/page_load_metrics/observers/android_page_load_metrics_observer.h"
 #endif  // OS_ANDROID
 #include "chrome/browser/page_load_metrics/observers/aborts_page_load_metrics_observer.h"
 #include "chrome/browser/page_load_metrics/observers/core_page_load_metrics_observer.h"
 #include "chrome/browser/page_load_metrics/observers/css_scanning_page_load_metrics_observer.h"
 #include "chrome/browser/page_load_metrics/observers/data_reduction_proxy_metrics_observer.h"
 #include "chrome/browser/page_load_metrics/observers/document_write_page_load_metrics_observer.h"
 #include "chrome/browser/page_load_metrics/observers/from_gws_page_load_metrics_observer.h"
 #include "chrome/browser/page_load_metrics/observers/google_captcha_observer.h"
 #include "chrome/browser/page_load_metrics/observers/https_engagement_metrics/https_engagement_page_load_metrics_observer.h"
 #include "chrome/browser/page_load_metrics/observers/no_state_prefetch_page_load_metrics_observer.h"
 #include "chrome/browser/page_load_metrics/observers/previews_page_load_metrics_observer.h"
 #include "chrome/browser/page_load_metrics/observers/service_worker_page_load_metrics_observer.h"
-#include "chrome/browser/page_load_metrics/observers/stale_while_revalidate_metrics_observer.h"
 #include "chrome/browser/prerender/prerender_contents.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/search/search.h"
 #include "components/rappor/rappor_service.h"
 #include "content/public/browser/web_contents.h"
 #include "url/gurl.h"
 
 namespace chrome {
 
 namespace {
@@ skipping 25 matching lines @@
     page_load_metrics::PageLoadTracker* tracker) {
   // These classes are owned by the metrics.
   tracker->AddObserver(base::MakeUnique<AbortsPageLoadMetricsObserver>());
   tracker->AddObserver(base::MakeUnique<CorePageLoadMetricsObserver>());
   tracker->AddObserver(
       base::MakeUnique<
           data_reduction_proxy::DataReductionProxyMetricsObserver>());
   tracker->AddObserver(base::MakeUnique<FromGWSPageLoadMetricsObserver>());
   tracker->AddObserver(
       base::MakeUnique<google_captcha_observer::GoogleCaptchaObserver>());
-  // TODO(ricea): Remove this in April 2016 or before. crbug.com/348877
-  tracker->AddObserver(
-      base::MakeUnique<chrome::StaleWhileRevalidateMetricsObserver>());
   tracker->AddObserver(
       base::MakeUnique<DocumentWritePageLoadMetricsObserver>());
   tracker->AddObserver(
       base::WrapUnique(new previews::PreviewsPageLoadMetricsObserver()));
   tracker->AddObserver(
       base::MakeUnique<ServiceWorkerPageLoadMetricsObserver>());
   tracker->AddObserver(base::MakeUnique<HttpsEngagementPageLoadMetricsObserver>(
       web_contents_->GetBrowserContext()));
   tracker->AddObserver(base::WrapUnique(new CssScanningMetricsObserver()));
   std::unique_ptr<page_load_metrics::PageLoadMetricsObserver>
@@ skipping 22 matching lines @@
 
 }  // namespace
 
 void InitializePageLoadMetricsForWebContents(
     content::WebContents* web_contents) {
   page_load_metrics::MetricsWebContentsObserver::CreateForWebContents(
       web_contents, base::MakeUnique<PageLoadMetricsEmbedder>(web_contents));
 }
 
 }  // namespace chrome