// Copyright 2015 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef IOS_CHROME_BROWSER_METRICS_MODEL_IOS_CHROME_STABILITY_METRICS_PROVIDER_H_
#define IOS_CHROME_BROWSER_METRICS_MODEL_IOS_CHROME_STABILITY_METRICS_PROVIDER_H_
#include "components/metrics/metrics_provider.h"
#include "components/metrics/stability_metrics_helper.h"
#include "ios/web/public/deprecated/global_web_state_observer.h"
class PrefService;
namespace web {
class NavigationContext;
} // namespace web
// IOSChromeStabilityMetricsProvider gathers and logs Chrome-specific stability-
// related metrics.
class IOSChromeStabilityMetricsProvider : public metrics::MetricsProvider,
public web::GlobalWebStateObserver {
public:
// Buckets for the histogram that counts events relevant for counting page
// loads. These events are mutually exclusive.
// These values are persisted to logs. Entries should not be renumbered and
// numeric values should never be reused.
enum class PageLoadCountNavigationType {
// A chrome:// URL navigation. This is not counted for page load.
CHROME_URL_NAVIGATION = 0,
// A same-document web (i.e. not chrome:// URL) navigation. This is not
// counted for page load.
SAME_DOCUMENT_WEB_NAVIGATION = 1,
// A navigation that is not SAME_DOCUMENT_WEB or CHROME_URL. It is counted
// as a page load.
PAGE_LOAD_NAVIGATION = 2,
// OBSOLETE VALUES. DO NOT REUSE.
OBSOLETE_LOADING_STARTED = 3,
COUNT
};
explicit IOSChromeStabilityMetricsProvider(PrefService* local_state);
IOSChromeStabilityMetricsProvider(const IOSChromeStabilityMetricsProvider&) =
delete;
IOSChromeStabilityMetricsProvider& operator=(
const IOSChromeStabilityMetricsProvider&) = delete;
~IOSChromeStabilityMetricsProvider() override;
// metrics::MetricsProvider:
void OnRecordingEnabled() override;
void OnRecordingDisabled() override;
// web::GlobalWebStateObserver:
void WebStateDidStartLoading(web::WebState* web_state) override;
void WebStateDidStartNavigation(
web::WebState* web_state,
web::NavigationContext* navigation_context) override;
void RenderProcessGone(web::WebState* web_state) override;
// Records a renderer process crash.
void LogRendererCrash();
static const char kPageLoadCountLoadingStartedMetric[];
static const char kPageLoadCountMetric[];
private:
metrics::StabilityMetricsHelper helper_;
// True if recording is currently enabled.
bool recording_enabled_;
};
#endif // IOS_CHROME_BROWSER_METRICS_MODEL_IOS_CHROME_STABILITY_METRICS_PROVIDER_H_