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- // Copyright 2019 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 "weblayer/browser/feature_list_creator.h"
- #include "base/base_switches.h"
- #include "base/command_line.h"
- #include "build/build_config.h"
- #include "components/metrics/metrics_state_manager.h"
- #include "components/prefs/pref_service.h"
- #include "components/variations/service/variations_service.h"
- #include "components/variations/variations_crash_keys.h"
- #include "components/variations/variations_switches.h"
- #include "content/public/browser/network_service_instance.h"
- #include "content/public/common/content_switch_dependent_feature_overrides.h"
- #include "services/network/public/cpp/shared_url_loader_factory.h"
- #include "weblayer/browser/system_network_context_manager.h"
- #include "weblayer/browser/weblayer_variations_service_client.h"
- #if BUILDFLAG(IS_ANDROID)
- #include "weblayer/browser/android/metrics/weblayer_metrics_service_client.h"
- #endif
- #if BUILDFLAG(IS_ANDROID)
- namespace switches {
- const char kDisableBackgroundNetworking[] = "disable-background-networking";
- } // namespace switches
- #endif
- namespace weblayer {
- namespace {
- FeatureListCreator* feature_list_creator_instance = nullptr;
- } // namespace
- FeatureListCreator::FeatureListCreator(PrefService* local_state)
- : local_state_(local_state) {
- DCHECK(local_state_);
- DCHECK(!feature_list_creator_instance);
- feature_list_creator_instance = this;
- }
- FeatureListCreator::~FeatureListCreator() {
- feature_list_creator_instance = nullptr;
- }
- // static
- FeatureListCreator* FeatureListCreator::GetInstance() {
- DCHECK(feature_list_creator_instance);
- return feature_list_creator_instance;
- }
- void FeatureListCreator::SetSystemNetworkContextManager(
- SystemNetworkContextManager* system_network_context_manager) {
- system_network_context_manager_ = system_network_context_manager;
- }
- void FeatureListCreator::CreateFeatureListAndFieldTrials() {
- #if BUILDFLAG(IS_ANDROID)
- WebLayerMetricsServiceClient::GetInstance()->Initialize(local_state_);
- #endif
- SetUpFieldTrials();
- }
- void FeatureListCreator::PerformPreMainMessageLoopStartup() {
- #if BUILDFLAG(IS_ANDROID)
- // It is expected this is called after SetUpFieldTrials().
- DCHECK(variations_service_);
- variations_service_->PerformPreMainMessageLoopStartup();
- #endif
- }
- void FeatureListCreator::OnBrowserFragmentStarted() {
- if (has_browser_fragment_started_)
- return;
- has_browser_fragment_started_ = true;
- // It is expected this is called after SetUpFieldTrials().
- DCHECK(variations_service_);
- // This function is called any time a BrowserFragment is started.
- // OnAppEnterForeground() really need only be called once, and because our
- // notion of a fragment doesn't really map to the Application as a whole,
- // call this function once.
- variations_service_->OnAppEnterForeground();
- }
- void FeatureListCreator::SetUpFieldTrials() {
- #if BUILDFLAG(IS_ANDROID)
- // The FieldTrialList should have been instantiated in
- // AndroidMetricsServiceClient::Initialize().
- DCHECK(base::FieldTrialList::GetInstance());
- DCHECK(system_network_context_manager_);
- auto* metrics_client = WebLayerMetricsServiceClient::GetInstance();
- variations_service_ = variations::VariationsService::Create(
- std::make_unique<WebLayerVariationsServiceClient>(
- system_network_context_manager_),
- local_state_, metrics_client->metrics_state_manager(),
- switches::kDisableBackgroundNetworking, variations::UIStringOverrider(),
- base::BindOnce(&content::GetNetworkConnectionTracker));
- variations_service_->OverridePlatform(
- variations::Study::PLATFORM_ANDROID_WEBLAYER, "android_weblayer");
- std::vector<std::string> variation_ids;
- auto feature_list = std::make_unique<base::FeatureList>();
- const base::CommandLine* command_line =
- base::CommandLine::ForCurrentProcess();
- variations_service_->SetUpFieldTrials(
- variation_ids,
- command_line->GetSwitchValueASCII(
- variations::switches::kForceVariationIds),
- content::GetSwitchDependentFeatureOverrides(*command_line),
- std::move(feature_list), &weblayer_field_trials_);
- variations::InitCrashKeys();
- #else
- // TODO(weblayer-dev): Support variations on desktop.
- #endif
- }
- } // namespace weblayer
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