Deprecate Once-Per-Origin Navigation histograms

chrome/browser/tab_contents/origins_seen_service_factory.cc

-// Copyright 2016 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/tab_contents/origins_seen_service_factory.h"
-
-#include "chrome/browser/profiles/incognito_helpers.h"
-#include "components/keyed_service/content/browser_context_dependency_manager.h"
-#include "components/navigation_metrics/origins_seen_service.h"
-
-// static
-navigation_metrics::OriginsSeenService*
-OriginsSeenServiceFactory::GetForBrowserContext(
-    content::BrowserContext* context) {
-  return static_cast<navigation_metrics::OriginsSeenService*>(
-      GetInstance()->GetServiceForBrowserContext(context, true));
-}
-
-// static
-OriginsSeenServiceFactory* OriginsSeenServiceFactory::GetInstance() {
-  return base::Singleton<OriginsSeenServiceFactory>::get();
-}
-
-// static
-KeyedService* OriginsSeenServiceFactory::BuildInstanceFor(
-    content::BrowserContext* context) {
-  return new navigation_metrics::OriginsSeenService();
-}
-
-OriginsSeenServiceFactory::OriginsSeenServiceFactory()
-    : BrowserContextKeyedServiceFactory(
-          "OriginsSeenService",
-          BrowserContextDependencyManager::GetInstance()) {}
-
-OriginsSeenServiceFactory::~OriginsSeenServiceFactory() {}
-
-content::BrowserContext* OriginsSeenServiceFactory::GetBrowserContextToUse(
-    content::BrowserContext* context) const {
-  return chrome::GetBrowserContextOwnInstanceInIncognito(context);
-}
-
-KeyedService* OriginsSeenServiceFactory::BuildServiceInstanceFor(
-    content::BrowserContext* context) const {
-  return BuildInstanceFor(context);
-}