[on-hold][subresource_filter] Add ActivationTracker to track all activated contents

chrome/browser/subresource_filter/subresource_filter_profile_context_factory.cc

 // Copyright 2017 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/subresource_filter/subresource_filter_profile_context_factory.h"
 
 #include "base/memory/singleton.h"
+#include "chrome/browser/profiles/incognito_helpers.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/subresource_filter/subresource_filter_profile_context.h"
 #include "components/keyed_service/content/browser_context_dependency_manager.h"
 #include "components/keyed_service/core/keyed_service.h"
 
 // static
-void SubresourceFilterProfileContextFactory::EnsureForProfile(
-    Profile* profile) {
-  GetInstance()->GetServiceForBrowserContext(profile, true /* create */);
+SubresourceFilterProfileContext*
+SubresourceFilterProfileContextFactory::GetForProfile(Profile* profile) {
+  return static_cast<SubresourceFilterProfileContext*>(
+      GetInstance()->GetServiceForBrowserContext(profile, true /* create */));
 }
 
 // static
 SubresourceFilterProfileContextFactory*
 SubresourceFilterProfileContextFactory::GetInstance() {
   return base::Singleton<SubresourceFilterProfileContextFactory>::get();
 }
 
 SubresourceFilterProfileContextFactory::SubresourceFilterProfileContextFactory()
     : BrowserContextKeyedServiceFactory(
           "SubresourceFilterProfileContext",
           BrowserContextDependencyManager::GetInstance()) {}
 
 KeyedService* SubresourceFilterProfileContextFactory::BuildServiceInstanceFor(
     content::BrowserContext* profile) const {
   return new SubresourceFilterProfileContext(static_cast<Profile*>(profile));
 }
+
+content::BrowserContext*
+SubresourceFilterProfileContextFactory::GetBrowserContextToUse(
+    content::BrowserContext* context) const {
+  return chrome::GetBrowserContextOwnInstanceInIncognito(context);
+}