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// 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 <memory>
#include "base/feature_list.h"
#include "base/macros.h"
#include "base/threading/thread_checker.h"
#include "components/metrics_services_manager/metrics_services_manager_client.h"
#if defined(OS_CHROMEOS)
#include "chrome/browser/chromeos/settings/stats_reporting_controller.h"
class PrefService;
namespace metrics {
class EnabledStateProvider;
class MetricsStateManager;
// Used only for testing.
namespace internal {
extern const base::Feature kMetricsReportingFeature;
namespace version_info {
enum class Channel;
// Provides a //chrome-specific implementation of MetricsServicesManagerClient.
class ChromeMetricsServicesManagerClient
: public metrics_services_manager::MetricsServicesManagerClient {
explicit ChromeMetricsServicesManagerClient(PrefService* local_state);
~ChromeMetricsServicesManagerClient() override;
// Unconditionally attempts to create a field trial to control client side
// metrics/crash sampling to use as a fallback when one hasn't been
// provided. This is expected to occur on first-run on platforms that don't
// have first-run variations support. This should only be called when there is
// no existing field trial controlling the sampling feature, and on the
// correct platform. |channel| will affect the sampling rates that are
// applied. Stable will be sampled at 10%, other channels at 99%.
static void CreateFallbackSamplingTrial(version_info::Channel channel,
base::FeatureList* feature_list);
// Determines if this client is eligible to send metrics. If they are, and
// there was user consent, then metrics and crashes would be reported.
static bool IsClientInSample();
// Gets the sample rate for in-sample clients. If the sample rate is not
// defined, returns false, and |rate| is unchanged, otherwise returns true,
// and |rate| contains the sample rate. If the client isn't in-sample, the
// sample rate is undefined. It is also undefined for clients that are not
// eligible for sampling.
static bool GetSamplingRatePerMille(int* rate);
#if defined(OS_CHROMEOS)
void OnCrosSettingsCreated();
// Accessor for the EnabledStateProvider instance used by this object.
const metrics::EnabledStateProvider& GetEnabledStateProviderForTesting();
// This is defined as a member class to get access to
// ChromeMetricsServiceAccessor through ChromeMetricsServicesManagerClient's
// friendship.
class ChromeEnabledStateProvider;
// metrics_services_manager::MetricsServicesManagerClient:
std::unique_ptr<rappor::RapporServiceImpl> CreateRapporServiceImpl() override;
std::unique_ptr<variations::VariationsService> CreateVariationsService()
std::unique_ptr<metrics::MetricsServiceClient> CreateMetricsServiceClient()
metrics::MetricsStateManager* GetMetricsStateManager() override;
scoped_refptr<network::SharedURLLoaderFactory> GetURLLoaderFactory() override;
bool IsMetricsReportingEnabled() override;
bool IsMetricsConsentGiven() override;
bool IsIncognitoSessionActive() override;
#if defined(OS_WIN)
// On Windows, the client controls whether Crashpad can upload crash reports.
void UpdateRunningServices(bool may_record, bool may_upload) override;
#endif // defined(OS_WIN)
// MetricsStateManager which is passed as a parameter to service constructors.
std::unique_ptr<metrics::MetricsStateManager> metrics_state_manager_;
// EnabledStateProvider to communicate if the client has consented to metrics
// reporting, and if it's enabled.
std::unique_ptr<metrics::EnabledStateProvider> enabled_state_provider_;
// Ensures that all functions are called from the same thread.
// Weak pointer to the local state prefs store.
PrefService* const local_state_;
#if defined(OS_CHROMEOS)