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// Copyright (c) 2012 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.
#ifndef CHROME_COMMON_METRICS_VARIATION_IDS_H_
#define CHROME_COMMON_METRICS_VARIATION_IDS_H_
#pragma once
namespace chrome_variations {
// A list of Chrome Variation IDs. These IDs are associated with FieldTrials
// for re-identification and analysis on Google servers.
// These enums are to be used with the experiments_helper ID associoation API.
//
// The IDs are defined as part of an enum to prevent re-use. When adding your
// own IDs, please respect the reserved IDs of other groups, as well as the
// global range of permitted values.
//
// When you want to create a FieldTrial that needs to be recognized by Google
// properties, reserve an ID by declaring them below. Please start with the name
// of the FieldTrial followed a short description.
//
// Ex:
// // Name: Instant-Field-Trial
// // The Omnibox Instant Trial.
// kInstantTrialOn = 3300123,
// kInstantTrialOff = 3300124,
//
// If you programatically generate FieldTrials, you can still use a loop to
// create your IDs. Just be sure to reserve the range of IDs here with a clear
// comment.
//
// Ex:
// // Name: UMA-Uniformity-Trial-5-Percent
// // Range: 330000 - 3300099
// // The 5% Uniformity Trial. This is a reserved range.
// kUniformityTrial5PercentStart = 330000,
// kUniformirtTrial5PercentEnd = 330099,
//
// Anything within the range of a uint32 should be castable to an ID, but
// please ensure that they are within the range of the min and max values.
enum ID {
// Used to represent no associated Chrome variation ID.
kEmptyID = 0,
// The smallest possible Chrome Variation ID in the reserved range. The
// first 10,000 values are reserved for internal variations infrastructure
// use. Please do not use values in this range.
kMinimumID = 3300000,
// Name: UMA-Uniformity-Trial-1-Percent
// Range: 3300000 - 3300099
kUniformity1PercentBase = kMinimumID,
kUniformity1PercentLimit = kUniformity1PercentBase + 100,
// Name: UMA-Uniformity-Trial-5-Percent
// Range: 3300100 - 3300119
kUniformity5PercentBase = kUniformity1PercentLimit,
kUniformity5PercentLimit = kUniformity5PercentBase + 20,
// Name: UMA-Uniformity-Trial-10-Percent
// Range: 3300120 - 3300129
kUniformity10PercentBase = kUniformity5PercentLimit,
kUniformity10PercentLimit = kUniformity10PercentBase + 10,
// Name: UMA-Uniformity-Trial-20-Percent
// Range: 3300130 - 3300134
kUniformity20PercentBase = kUniformity10PercentLimit,
kUniformity20PercentLimit = kUniformity20PercentBase + 5,
// Name: UMA-Uniformity-Trial-50-Percent
// Range: 3300135 - 3300136
kUniformity50PercentBase = kUniformity20PercentLimit,
kUniformity50PercentLimit = kUniformity50PercentBase + 2,
// Name: UMA-Dynamic-Binary-Uniformity-Trial
// The dynamic uniformity trial is only specified on the server, this is just
// to reserve the id.
kDynamicUniformityDefault = 3300137,
kDynamicUniformityGroup01 = 3300138,
// Name: UMA-Session-Randomized-Uniformity-Trial-5-Percent
// Range: 3300139 - 3300158
// A uniformity trial used to compare one-time-randomized and
// session-randomized FieldTrials.
kUniformitySessionRandomized5PercentBase = 3300139,
kUniformitySessionRandomized5PercentLimit =
kUniformitySessionRandomized5PercentBase + 20,
kUniformityTrialsMax = 3300158,
// Some values reserved for unit and integration tests.
kTestValueA = 3300200,
kTestValueB = 3300201,
// USABLE IDs BEGIN HERE.
//
// The smallest possible Chrome Variation ID for use in real FieldTrials. If
// you are defining variation IDs for your own FieldTrials, NEVER use a value
// lower than this.
kMinimumUserID = 3310000,
// Add new variation IDs below.
// Name: OmniboxSearchSuggest
// Range: 3310000 - 3310019
// Suggest (Autocomplete) field trial, 20 IDs.
kSuggestIDMin = 3310000,
kSuggestIDMax = 3310019,
// Instant field trial.
kInstantIDControl = 3310020,
kInstantIDSilent = 3310021,
kInstantIDHidden = 3310022,
kInstantIDSuggest = 3310023,
kInstantIDInstant = 3310024,
// USABLE IDs END HERE.
//
// The largest possible Chrome variation ID in the reserved range. When
// defining your variation IDs, DO NOT exceed this value.
kMaximumID = 3399999,
};
} // namespace chrome_variations
#endif // CHROME_COMMON_METRICS_VARIATION_IDS_H_
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