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| 1 // Copyright 2017 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/installer/util/experiment_storage.h" |
| 6 |
| 7 #include <windows.h> |
| 8 |
| 9 #include <stdint.h> |
| 10 |
| 11 #include <limits> |
| 12 #include <string> |
| 13 |
| 14 #include "base/base64.h" |
| 15 #include "base/bind.h" |
| 16 #include "base/bind_helpers.h" |
| 17 #include "base/logging.h" |
| 18 #include "base/memory/ptr_util.h" |
| 19 #include "base/strings/utf_string_conversions.h" |
| 20 #include "base/task_scheduler/post_task.h" |
| 21 #include "base/task_scheduler/task_traits.h" |
| 22 #include "base/time/time.h" |
| 23 #include "base/win/registry.h" |
| 24 #include "base/win/win_util.h" |
| 25 #include "chrome/install_static/install_details.h" |
| 26 #include "chrome/install_static/install_modes.h" |
| 27 #include "chrome/install_static/install_util.h" |
| 28 #include "chrome/installer/util/experiment.h" |
| 29 #include "chrome/installer/util/experiment_labels.h" |
| 30 #include "chrome/installer/util/experiment_metrics.h" |
| 31 #include "chrome/installer/util/google_update_settings.h" |
| 32 #include "chrome/installer/util/shell_util.h" |
| 33 |
| 34 namespace installer { |
| 35 |
| 36 namespace { |
| 37 |
| 38 constexpr base::char16 kExperimentLabelName[] = L"CrExp60"; |
| 39 constexpr wchar_t kRegKeyRetention[] = L"\\Retention"; |
| 40 constexpr wchar_t kRegValueActionDelay[] = L"ActionDelay"; |
| 41 constexpr wchar_t kRegValueFirstDisplayTime[] = L"FirstDisplayTime"; |
| 42 constexpr wchar_t kRegValueGroup[] = L"Group"; |
| 43 constexpr wchar_t kRegValueInactiveDays[] = L"InactiveDays"; |
| 44 constexpr wchar_t kRegValueLatestDisplayTime[] = L"LatestDisplayTime"; |
| 45 constexpr wchar_t kRegValueRetentionStudy[] = L"RetentionStudy"; |
| 46 constexpr wchar_t kRegValueState[] = L"State"; |
| 47 constexpr wchar_t kRegValueToastCount[] = L"ToastCount"; |
| 48 constexpr wchar_t kRegValueToastLocation[] = L"ToastLocation"; |
| 49 constexpr wchar_t kRegValueUserSessionUptime[] = L"UserSessionUptime"; |
| 50 |
| 51 constexpr int kSessionLengthBucketLowestBit = 0; |
| 52 constexpr int kActionDelayBucketLowestBit = |
| 53 ExperimentMetrics::kSessionLengthBucketBits + kSessionLengthBucketLowestBit; |
| 54 constexpr int kLastUsedBucketLowestBit = |
| 55 ExperimentMetrics::kActionDelayBucketBits + kActionDelayBucketLowestBit; |
| 56 constexpr int kToastHourLowestBit = |
| 57 ExperimentMetrics::kLastUsedBucketBits + kLastUsedBucketLowestBit; |
| 58 constexpr int kFirstToastOffsetLowestBit = |
| 59 ExperimentMetrics::kToastHourBits + kToastHourLowestBit; |
| 60 constexpr int kToastCountLowestBit = |
| 61 ExperimentMetrics::kFirstToastOffsetBits + kFirstToastOffsetLowestBit; |
| 62 constexpr int kToastLocationLowestBit = |
| 63 ExperimentMetrics::kToastCountBits + kToastCountLowestBit; |
| 64 constexpr int kStateLowestBit = |
| 65 ExperimentMetrics::kToastLocationBits + kToastLocationLowestBit; |
| 66 constexpr int kGroupLowestBit = ExperimentMetrics::kStateBits + kStateLowestBit; |
| 67 constexpr int kLowestUnusedBit = |
| 68 ExperimentMetrics::kGroupBits + kGroupLowestBit; |
| 69 |
| 70 // Helper functions ------------------------------------------------------------ |
| 71 |
| 72 // Returns the name of the global mutex used to protect the storage location. |
| 73 base::string16 GetMutexName() { |
| 74 base::string16 name(L"Global\\"); |
| 75 name.append(install_static::kCompanyPathName); |
| 76 name.append(ShellUtil::GetBrowserModelId(!install_static::IsSystemInstall())); |
| 77 name.append(L"ExperimentStorageMutex"); |
| 78 return name; |
| 79 } |
| 80 |
| 81 // Populates |path| with the path to the registry key in which the current |
| 82 // user's experiment state is stored. Returns false if the path cannot be |
| 83 // determined. |
| 84 bool GetExperimentStateKeyPath(bool system_level, base::string16* path) { |
| 85 const install_static::InstallDetails& install_details = |
| 86 install_static::InstallDetails::Get(); |
| 87 |
| 88 if (!system_level) { |
| 89 *path = install_details.GetClientStateKeyPath().append(kRegKeyRetention); |
| 90 return true; |
| 91 } |
| 92 |
| 93 base::string16 user_sid; |
| 94 if (base::win::GetUserSidString(&user_sid)) { |
| 95 *path = install_details.GetClientStateMediumKeyPath() |
| 96 .append(kRegKeyRetention) |
| 97 .append(L"\\") |
| 98 .append(user_sid); |
| 99 return true; |
| 100 } |
| 101 |
| 102 NOTREACHED(); |
| 103 return false; |
| 104 } |
| 105 |
| 106 bool OpenParticipationKey(bool write_access, base::win::RegKey* key) { |
| 107 const install_static::InstallDetails& details = |
| 108 install_static::InstallDetails::Get(); |
| 109 LONG result = key->Open( |
| 110 details.system_level() ? HKEY_LOCAL_MACHINE : HKEY_CURRENT_USER, |
| 111 details.GetClientStateKeyPath().c_str(), |
| 112 KEY_WOW64_32KEY | (write_access ? KEY_SET_VALUE : KEY_QUERY_VALUE)); |
| 113 return result == ERROR_SUCCESS; |
| 114 } |
| 115 |
| 116 // Reads |value_name| into |result|. Returns false if the value is not found or |
| 117 // is out of range. |
| 118 template <class T> |
| 119 bool ReadBoundedDWORD(base::win::RegKey* key, |
| 120 const wchar_t* value_name, |
| 121 DWORD min_value, |
| 122 DWORD max_value, |
| 123 T* result) { |
| 124 DWORD dword_value; |
| 125 if (key->ReadValueDW(value_name, &dword_value) != ERROR_SUCCESS) |
| 126 return false; |
| 127 if (dword_value < min_value || dword_value > max_value) |
| 128 return false; |
| 129 *result = static_cast<T>(dword_value); |
| 130 return true; |
| 131 } |
| 132 |
| 133 // Reads the internal representation of a Time or TimeDelta from |value_name| |
| 134 // into |result|. Returns false if the value is not found or is out of range. |
| 135 template <class T> |
| 136 bool ReadTime(base::win::RegKey* key, const wchar_t* value_name, T* result) { |
| 137 int64_t qword_value; |
| 138 if (key->ReadInt64(value_name, &qword_value) != ERROR_SUCCESS) |
| 139 return false; |
| 140 *result = T::FromInternalValue(qword_value); |
| 141 return true; |
| 142 } |
| 143 |
| 144 void WriteTime(base::win::RegKey* key, |
| 145 const wchar_t* value_name, |
| 146 int64_t internal_time_value) { |
| 147 key->WriteValue(value_name, &internal_time_value, sizeof(internal_time_value), |
| 148 REG_QWORD); |
| 149 } |
| 150 |
| 151 } // namespace |
| 152 |
| 153 // ExperimentStorage::Lock ----------------------------------------------------- |
| 154 |
| 155 ExperimentStorage::Lock::~Lock() { |
| 156 BOOL result = ::ReleaseMutex(storage_->mutex_.Get()); |
| 157 DCHECK(result); |
| 158 } |
| 159 |
| 160 bool ExperimentStorage::Lock::ReadParticipation(Participation* participation) { |
| 161 base::win::RegKey key; |
| 162 // A failure to open the key likely indicates that this isn't running from a |
| 163 // real install of Chrome. |
| 164 if (!OpenParticipationKey(false /* !write_access */, &key)) |
| 165 return false; |
| 166 |
| 167 DWORD value = 0; |
| 168 LONG result = key.ReadValueDW(kRegValueRetentionStudy, &value); |
| 169 if (result != ERROR_SUCCESS) { |
| 170 // This likely means that the value is not present. |
| 171 *participation = Participation::kNotEvaluated; |
| 172 } else if (value == 0) { |
| 173 *participation = Participation::kNotParticipating; |
| 174 } else { |
| 175 *participation = Participation::kIsParticipating; |
| 176 } |
| 177 return true; |
| 178 } |
| 179 |
| 180 bool ExperimentStorage::Lock::WriteParticipation(Participation participation) { |
| 181 base::win::RegKey key; |
| 182 // A failure to open the key likely indicates that this isn't running from a |
| 183 // real install of Chrome. |
| 184 if (!OpenParticipationKey(true /* write_access */, &key)) |
| 185 return false; |
| 186 |
| 187 if (participation == Participation::kNotEvaluated) |
| 188 return key.DeleteValue(kRegValueRetentionStudy) == ERROR_SUCCESS; |
| 189 const DWORD value = participation == Participation::kIsParticipating ? 1 : 0; |
| 190 return key.WriteValue(kRegValueRetentionStudy, value) == ERROR_SUCCESS; |
| 191 } |
| 192 |
| 193 bool ExperimentStorage::Lock::LoadExperiment(Experiment* experiment) { |
| 194 // This function loads both the experiment metrics and state from the |
| 195 // registry. |
| 196 // - If no metrics are found: |experiment| is cleared, and true is returned. |
| 197 // (Per-user experiment data in the registry is ignored for all users.) |
| 198 // - If metrics indicate an initial state (prior to a user being elected into |
| 199 // an experiment group): |experiment| is populated with the metrics and true |
| 200 // is returned. (Per-user experiment data in the registry is ignored for all |
| 201 // users.) |
| 202 // - If metrics indicate an intermediate or terminal state and per-user |
| 203 // experiment data is in the same state: |experiment| is populated with all |
| 204 // data from the registry and true is returned. |
| 205 // Otherwise, the metrics correspond to a different user on the machine, so |
| 206 // false is returned. |
| 207 |
| 208 *experiment = Experiment(); |
| 209 |
| 210 ExperimentMetrics metrics; |
| 211 if (!storage_->LoadMetricsUnsafe(&metrics)) |
| 212 return false; // Error reading metrics -- do nothing. |
| 213 |
| 214 if (metrics.InInitialState()) { |
| 215 // There should be no per-user experiment data present (ignore it if there |
| 216 // happens to be somehow). |
| 217 experiment->InitializeFromMetrics(metrics); |
| 218 return true; |
| 219 } |
| 220 |
| 221 Experiment temp_experiment; |
| 222 if (!storage_->LoadStateUnsafe(&temp_experiment)) |
| 223 return false; |
| 224 |
| 225 // Verify that the state matches the metrics. Ignore the state if this is not |
| 226 // the case, as the metrics are the source of truth. |
| 227 if (temp_experiment.state() != metrics.state) |
| 228 return false; |
| 229 |
| 230 *experiment = temp_experiment; |
| 231 return true; |
| 232 } |
| 233 |
| 234 bool ExperimentStorage::Lock::StoreExperiment(const Experiment& experiment) { |
| 235 bool ret = storage_->StoreMetricsUnsafe(experiment.metrics()); |
| 236 return storage_->StoreStateUnsafe(experiment) && ret; |
| 237 } |
| 238 |
| 239 bool ExperimentStorage::Lock::LoadMetrics(ExperimentMetrics* metrics) { |
| 240 DCHECK_EQ(ExperimentMetrics::kUninitialized, metrics->state); |
| 241 return storage_->LoadMetricsUnsafe(metrics); |
| 242 } |
| 243 |
| 244 bool ExperimentStorage::Lock::StoreMetrics(const ExperimentMetrics& metrics) { |
| 245 DCHECK_NE(ExperimentMetrics::kUninitialized, metrics.state); |
| 246 return storage_->StoreMetricsUnsafe(metrics); |
| 247 } |
| 248 |
| 249 ExperimentStorage::Lock::Lock(ExperimentStorage* storage) : storage_(storage) { |
| 250 DCHECK(storage); |
| 251 DWORD result = ::WaitForSingleObject(storage_->mutex_.Get(), INFINITE); |
| 252 PLOG_IF(FATAL, result == WAIT_FAILED) |
| 253 << "Failed to lock ExperimentStorage mutex"; |
| 254 } |
| 255 |
| 256 // ExperimentStorage ----------------------------------------------------------- |
| 257 |
| 258 ExperimentStorage::ExperimentStorage() |
| 259 : mutex_(::CreateMutex(nullptr, FALSE, GetMutexName().c_str())) {} |
| 260 |
| 261 ExperimentStorage::~ExperimentStorage() {} |
| 262 |
| 263 std::unique_ptr<ExperimentStorage::Lock> ExperimentStorage::AcquireLock() { |
| 264 return base::WrapUnique(new Lock(this)); |
| 265 } |
| 266 |
| 267 // static |
| 268 int ExperimentStorage::ReadUint64Bits(uint64_t source, |
| 269 int bit_length, |
| 270 int low_bit) { |
| 271 DCHECK(bit_length > 0 && bit_length <= static_cast<int>(sizeof(int) * 8) && |
| 272 low_bit + bit_length <= static_cast<int>(sizeof(source) * 8)); |
| 273 uint64_t bit_mask = (1ULL << bit_length) - 1; |
| 274 return static_cast<int>((source >> low_bit) & bit_mask); |
| 275 } |
| 276 |
| 277 // static |
| 278 void ExperimentStorage::SetUint64Bits(int value, |
| 279 int bit_length, |
| 280 int low_bit, |
| 281 uint64_t* target) { |
| 282 DCHECK(bit_length > 0 && bit_length <= static_cast<int>(sizeof(value) * 8) && |
| 283 low_bit + bit_length <= static_cast<int>(sizeof(*target) * 8)); |
| 284 uint64_t bit_mask = (1ULL << bit_length) - 1; |
| 285 *target |= ((static_cast<uint64_t>(value) & bit_mask) << low_bit); |
| 286 } |
| 287 |
| 288 bool ExperimentStorage::DecodeMetrics(base::StringPiece16 encoded_metrics, |
| 289 ExperimentMetrics* metrics) { |
| 290 std::string metrics_data; |
| 291 |
| 292 if (!base::Base64Decode(base::UTF16ToASCII(encoded_metrics), &metrics_data)) |
| 293 return false; |
| 294 |
| 295 if (metrics_data.size() != 6) |
| 296 return false; |
| 297 |
| 298 uint64_t metrics_value = 0; |
| 299 for (size_t i = 0; i < metrics_data.size(); ++i) |
| 300 SetUint64Bits(metrics_data[i], 8, 8 * i, &metrics_value); |
| 301 |
| 302 ExperimentMetrics result; |
| 303 result.session_length_bucket = |
| 304 ReadUint64Bits(metrics_value, ExperimentMetrics::kSessionLengthBucketBits, |
| 305 kSessionLengthBucketLowestBit); |
| 306 result.action_delay_bucket = |
| 307 ReadUint64Bits(metrics_value, ExperimentMetrics::kActionDelayBucketBits, |
| 308 kActionDelayBucketLowestBit); |
| 309 result.last_used_bucket = |
| 310 ReadUint64Bits(metrics_value, ExperimentMetrics::kLastUsedBucketBits, |
| 311 kLastUsedBucketLowestBit); |
| 312 result.toast_hour = ReadUint64Bits( |
| 313 metrics_value, ExperimentMetrics::kToastHourBits, kToastHourLowestBit); |
| 314 result.first_toast_offset_days = |
| 315 ReadUint64Bits(metrics_value, ExperimentMetrics::kFirstToastOffsetBits, |
| 316 kFirstToastOffsetLowestBit); |
| 317 result.toast_count = ReadUint64Bits( |
| 318 metrics_value, ExperimentMetrics::kToastCountBits, kToastCountLowestBit); |
| 319 result.toast_location = static_cast<ExperimentMetrics::ToastLocation>( |
| 320 ReadUint64Bits(metrics_value, ExperimentMetrics::kToastLocationBits, |
| 321 kToastLocationLowestBit)); |
| 322 |
| 323 static_assert(ExperimentMetrics::State::NUM_STATES <= (1 << 4), |
| 324 "Too many states for ExperimentMetrics encoding."); |
| 325 result.state = static_cast<ExperimentMetrics::State>(ReadUint64Bits( |
| 326 metrics_value, ExperimentMetrics::kStateBits, kStateLowestBit)); |
| 327 result.group = ReadUint64Bits(metrics_value, ExperimentMetrics::kGroupBits, |
| 328 kGroupLowestBit); |
| 329 |
| 330 if (ReadUint64Bits(metrics_value, |
| 331 sizeof(metrics_value) * 8 - kLowestUnusedBit, |
| 332 kLowestUnusedBit)) { |
| 333 return false; |
| 334 } |
| 335 |
| 336 *metrics = result; |
| 337 return true; |
| 338 } |
| 339 |
| 340 // static |
| 341 base::string16 ExperimentStorage::EncodeMetrics( |
| 342 const ExperimentMetrics& metrics) { |
| 343 uint64_t metrics_value = 0; |
| 344 SetUint64Bits(metrics.session_length_bucket, |
| 345 ExperimentMetrics::kSessionLengthBucketBits, |
| 346 kSessionLengthBucketLowestBit, &metrics_value); |
| 347 SetUint64Bits(metrics.action_delay_bucket, |
| 348 ExperimentMetrics::kActionDelayBucketBits, |
| 349 kActionDelayBucketLowestBit, &metrics_value); |
| 350 SetUint64Bits(metrics.last_used_bucket, |
| 351 ExperimentMetrics::kLastUsedBucketBits, |
| 352 kLastUsedBucketLowestBit, &metrics_value); |
| 353 SetUint64Bits(metrics.toast_hour, ExperimentMetrics::kToastHourBits, |
| 354 kToastHourLowestBit, &metrics_value); |
| 355 SetUint64Bits(metrics.first_toast_offset_days, |
| 356 ExperimentMetrics::kFirstToastOffsetBits, |
| 357 kFirstToastOffsetLowestBit, &metrics_value); |
| 358 SetUint64Bits(metrics.toast_count, ExperimentMetrics::kToastCountBits, |
| 359 kToastCountLowestBit, &metrics_value); |
| 360 SetUint64Bits(metrics.toast_location, ExperimentMetrics::kToastLocationBits, |
| 361 kToastLocationLowestBit, &metrics_value); |
| 362 static_assert(ExperimentMetrics::State::NUM_STATES <= (1 << 4), |
| 363 "Too many states for ExperimentMetrics encoding."); |
| 364 SetUint64Bits(metrics.state, ExperimentMetrics::kStateBits, kStateLowestBit, |
| 365 &metrics_value); |
| 366 SetUint64Bits(metrics.group, ExperimentMetrics::kGroupBits, kGroupLowestBit, |
| 367 &metrics_value); |
| 368 |
| 369 std::string metrics_data(6, '\0'); |
| 370 for (size_t i = 0; i < metrics_data.size(); ++i) { |
| 371 metrics_data[i] = |
| 372 static_cast<char>(ReadUint64Bits(metrics_value, 8, 8 * i)); |
| 373 } |
| 374 std::string encoded_metrics; |
| 375 base::Base64Encode(metrics_data, &encoded_metrics); |
| 376 return base::ASCIIToUTF16(encoded_metrics); |
| 377 } |
| 378 |
| 379 bool ExperimentStorage::LoadMetricsUnsafe(ExperimentMetrics* metrics) { |
| 380 base::string16 value; |
| 381 |
| 382 if (!GoogleUpdateSettings::ReadExperimentLabels( |
| 383 install_static::IsSystemInstall(), &value)) { |
| 384 return false; |
| 385 } |
| 386 |
| 387 ExperimentLabels experiment_labels(value); |
| 388 base::StringPiece16 encoded_metrics = |
| 389 experiment_labels.GetValueForLabel(kExperimentLabelName); |
| 390 if (encoded_metrics.empty()) { |
| 391 *metrics = ExperimentMetrics(); |
| 392 return true; |
| 393 } |
| 394 |
| 395 return DecodeMetrics(encoded_metrics, metrics); |
| 396 } |
| 397 |
| 398 bool ExperimentStorage::StoreMetricsUnsafe(const ExperimentMetrics& metrics) { |
| 399 base::string16 value; |
| 400 if (!GoogleUpdateSettings::ReadExperimentLabels( |
| 401 install_static::IsSystemInstall(), &value)) { |
| 402 return false; |
| 403 } |
| 404 ExperimentLabels experiment_labels(value); |
| 405 |
| 406 experiment_labels.SetValueForLabel(kExperimentLabelName, |
| 407 EncodeMetrics(metrics), |
| 408 base::TimeDelta::FromDays(182)); |
| 409 |
| 410 return GoogleUpdateSettings::SetExperimentLabels( |
| 411 install_static::IsSystemInstall(), experiment_labels.value()); |
| 412 } |
| 413 |
| 414 bool ExperimentStorage::LoadStateUnsafe(Experiment* experiment) { |
| 415 const bool system_level = install_static::IsSystemInstall(); |
| 416 |
| 417 base::string16 path; |
| 418 if (!GetExperimentStateKeyPath(system_level, &path)) |
| 419 return false; |
| 420 |
| 421 const HKEY root = system_level ? HKEY_LOCAL_MACHINE : HKEY_CURRENT_USER; |
| 422 base::win::RegKey key; |
| 423 if (key.Open(root, path.c_str(), KEY_QUERY_VALUE | KEY_WOW64_32KEY) != |
| 424 ERROR_SUCCESS) { |
| 425 return false; |
| 426 } |
| 427 |
| 428 return ReadBoundedDWORD(&key, kRegValueState, 0, |
| 429 ExperimentMetrics::NUM_STATES, &experiment->state_) && |
| 430 ReadBoundedDWORD(&key, kRegValueGroup, 0, |
| 431 ExperimentMetrics::kNumGroups - 1, |
| 432 &experiment->group_) && |
| 433 ReadBoundedDWORD(&key, kRegValueToastLocation, 0, 1, |
| 434 &experiment->toast_location_) && |
| 435 ReadBoundedDWORD(&key, kRegValueInactiveDays, 0, INT_MAX, |
| 436 &experiment->inactive_days_) && |
| 437 ReadBoundedDWORD(&key, kRegValueToastCount, 0, |
| 438 ExperimentMetrics::kMaxToastCount, |
| 439 &experiment->toast_count_) && |
| 440 ReadTime(&key, kRegValueFirstDisplayTime, |
| 441 &experiment->first_display_time_) && |
| 442 ReadTime(&key, kRegValueLatestDisplayTime, |
| 443 &experiment->latest_display_time_) && |
| 444 ReadTime(&key, kRegValueUserSessionUptime, |
| 445 &experiment->user_session_uptime_) && |
| 446 ReadTime(&key, kRegValueActionDelay, &experiment->action_delay_); |
| 447 } |
| 448 |
| 449 bool ExperimentStorage::StoreStateUnsafe(const Experiment& experiment) { |
| 450 const bool system_level = install_static::IsSystemInstall(); |
| 451 |
| 452 base::string16 path; |
| 453 if (!GetExperimentStateKeyPath(system_level, &path)) |
| 454 return false; |
| 455 |
| 456 const HKEY root = system_level ? HKEY_LOCAL_MACHINE : HKEY_CURRENT_USER; |
| 457 base::win::RegKey key; |
| 458 if (key.Create(root, path.c_str(), KEY_SET_VALUE | KEY_WOW64_32KEY) != |
| 459 ERROR_SUCCESS) { |
| 460 return false; |
| 461 } |
| 462 |
| 463 key.WriteValue(kRegValueState, experiment.state()); |
| 464 key.WriteValue(kRegValueGroup, experiment.group()); |
| 465 key.WriteValue(kRegValueToastLocation, experiment.toast_location()); |
| 466 key.WriteValue(kRegValueInactiveDays, experiment.inactive_days()); |
| 467 key.WriteValue(kRegValueToastCount, experiment.toast_count()); |
| 468 WriteTime(&key, kRegValueFirstDisplayTime, |
| 469 experiment.first_display_time().ToInternalValue()); |
| 470 WriteTime(&key, kRegValueLatestDisplayTime, |
| 471 experiment.latest_display_time().ToInternalValue()); |
| 472 WriteTime(&key, kRegValueUserSessionUptime, |
| 473 experiment.user_session_uptime().ToInternalValue()); |
| 474 WriteTime(&key, kRegValueActionDelay, |
| 475 experiment.action_delay().ToInternalValue()); |
| 476 return true; |
| 477 } |
| 478 |
| 479 } // namespace installer |
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