// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#import "ios/chrome/browser/metrics/model/tab_usage_recorder_metrics.h"
namespace tab_usage_recorder {
// The histogram recording the state of the tab the user switches to.
const char kSelectedTabHistogramName[] =
"Tab.StatusWhenSwitchedBackToForeground";
// The histogram to record the number of page loads before an evicted tab is
// selected.
const char kPageLoadsBeforeEvictedTabSelected[] =
"Tab.PageLoadsSinceLastSwitchToEvictedTab";
// The name of the histogram that records time intervals between tab restores.
const char kTimeBetweenRestores[] = "Tabs.TimeBetweenRestores";
// The name of the histogram that records time intervals since the last restore.
const char kTimeAfterLastRestore[] = "Tabs.TimeAfterLastRestore";
// Name of histogram to record the number of alive renderers when a renderer
// termination is received.
const char kRendererTerminationAliveRenderers[] =
"Tab.RendererTermination.AliveRenderersCount";
const char kRendererTerminationTotalTabCount[] =
"Tab.RendererTermination.TotalTabCount";
// Name of histogram to record the number of renderers that were alive shortly
// before a renderer termination. This metric is being recorded in case the OS
// kills renderers in batches.
const char kRendererTerminationRecentlyAliveRenderers[] =
"Tab.RendererTermination.RecentlyAliveRenderersCount";
// Name of histogram for recording the state of the tab when the renderer is
// terminated.
const char kRendererTerminationStateHistogram[] =
"Tab.StateAtRendererTermination";
// The recently alive renderer count metric counts all renderers that were alive
// x seconds before a renderer termination. `kSecondsBeforeRendererTermination`
// specifies x.
const int kSecondsBeforeRendererTermination = 2;
} // namespace tab_usage_recorder