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| 1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #include "chrome/browser/ui/webui/sync_promo_trial.h" | |
| 6 | |
| 7 #include "base/metrics/field_trial.h" | |
| 8 #include "chrome/browser/metrics/metrics_service.h" | |
| 9 #include "chrome/browser/prefs/pref_service.h" | |
| 10 #include "grit/generated_resources.h" | |
| 11 | |
| 12 namespace sync_promo_trial { | |
| 13 | |
| 14 // Field trial IDs of the control and experiment groups. Though they are not | |
| 15 // literally "const", they are set only once, in Activate() below. See the .h | |
| 16 // file for what these groups represent. | |
| 17 int g_sync_promo_experiment_a = 0; | |
| 18 int g_sync_promo_experiment_b = 0; | |
| 19 int g_sync_promo_experiment_c = 0; | |
| 20 int g_sync_promo_experiment_d = 0; | |
| 21 | |
| 22 const char kSyncPromoMsgTrialName[] = "SyncPromoMsg"; | |
| 23 | |
| 24 void Activate() { | |
| 25 // The end date (February 21, 2012) is approximately 2 weeks into M17 stable. | |
| 26 scoped_refptr<base::FieldTrial> trial( | |
| 27 new base::FieldTrial(kSyncPromoMsgTrialName, 1000, "MsgA", 2012, 2, 21)); | |
| 28 g_sync_promo_experiment_a = base::FieldTrial::kDefaultGroupNumber; | |
| 29 | |
| 30 // Try to give the user a consistent experience, if possible. | |
| 31 if (base::FieldTrialList::IsOneTimeRandomizationEnabled()) | |
| 32 trial->UseOneTimeRandomization(); | |
| 33 | |
| 34 // Each group has probability 0.5%, leaving the control with 98.5%. | |
| 35 g_sync_promo_experiment_b = trial->AppendGroup("MsgB", 50); | |
| 36 g_sync_promo_experiment_c = trial->AppendGroup("MsgC", 50); | |
| 37 g_sync_promo_experiment_d = trial->AppendGroup("MsgD", 50); | |
| 38 } | |
| 39 | |
| 40 bool IsExperimentActive() { | |
| 41 return base::FieldTrialList::FindValue(kSyncPromoMsgTrialName) != | |
| 42 base::FieldTrial::kNotFinalized; | |
| 43 } | |
| 44 | |
| 45 Group GetGroup() { | |
| 46 // Promo message A is also the default value, so display it if there is no | |
| 47 // active experiment. | |
| 48 if (!IsExperimentActive()) | |
| 49 return PROMO_MSG_A; | |
| 50 | |
| 51 const int group = base::FieldTrialList::FindValue(kSyncPromoMsgTrialName); | |
| 52 if (group == g_sync_promo_experiment_a) | |
| 53 return PROMO_MSG_A; | |
| 54 else if (group == g_sync_promo_experiment_b) | |
| 55 return PROMO_MSG_B; | |
| 56 else if (group == g_sync_promo_experiment_c) | |
| 57 return PROMO_MSG_C; | |
| 58 else if (group == g_sync_promo_experiment_d) | |
| 59 return PROMO_MSG_D; | |
| 60 | |
| 61 NOTREACHED(); | |
| 62 return PROMO_MSG_A; | |
| 63 } | |
| 64 | |
| 65 int GetMessageBodyResID() { | |
| 66 // Note that GetGroup and the switch will take care of the !IsExperimentActive | |
| 67 // case for us. | |
| 68 Group group = GetGroup(); | |
| 69 switch (group) { | |
| 70 case PROMO_MSG_A: | |
| 71 return IDS_SYNC_PROMO_MESSAGE_BODY_A; | |
| 72 case PROMO_MSG_B: | |
| 73 return IDS_SYNC_PROMO_MESSAGE_BODY_B; | |
| 74 case PROMO_MSG_C: | |
| 75 return IDS_SYNC_PROMO_MESSAGE_BODY_C; | |
| 76 case PROMO_MSG_D: | |
| 77 return IDS_SYNC_PROMO_MESSAGE_BODY_D; | |
| 78 case PROMO_MSG_MAX: | |
| 79 break; | |
| 80 } | |
| 81 | |
| 82 NOTREACHED(); | |
| 83 return IDS_SYNC_PROMO_MESSAGE_BODY_A; | |
| 84 } | |
| 85 | |
| 86 void RecordUserSawMessage() { | |
| 87 DCHECK(IsExperimentActive()); | |
| 88 UMA_HISTOGRAM_ENUMERATION("SyncPromo.MessageDisplayed", | |
| 89 GetGroup(), | |
| 90 PROMO_MSG_MAX); | |
| 91 } | |
| 92 | |
| 93 void RecordUserSignedIn() { | |
| 94 DCHECK(IsExperimentActive()); | |
| 95 UMA_HISTOGRAM_ENUMERATION("SyncPromo.MessageOnSignIn", | |
| 96 GetGroup(), | |
| 97 PROMO_MSG_MAX); | |
| 98 } | |
| 99 | |
| 100 } // namespace sync_promo_trial | |
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Chromium Code Reviews
Issue 8992034:
Merge 114608, 115692 to 963 (M17) branch. (Closed)
Base URL: svn://svn.chromium.org/chrome/branches/963/src/