Remove Linux kernel 4.4.0 workaround for persistent histograms.

The special handling to force local memory for persistent histograms on
Linux kernel 4.4.0 is no longer necessary as this kernel version is
obsolete.

Per Chrome system reqs
(https://support.google.com/chrome/a/answer/7100626?hl=en), min
supported versions are:

- 64-bit Ubuntu 18.04+
  -> Released with Linux kernel 4.15.
- Debian 10+
  -> Released with Linux kernel 4.19.
- openSUSE 15.5+
  -> Based on SUSE Linux Enterprise 15 SP5 and typically uses a
     kernel based on Linux 5.14.
- Fedora Linux 39+
  -> Released with Linux kernel 6.5.

Change-Id: Ic89c4af2686716d45b505e45da81f08fd902665f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/7232772
Reviewed-by: Lei Zhang <[email protected]>
Auto-Submit: Alexei Svitkine <[email protected]>
Commit-Queue: Alexei Svitkine <[email protected]>
Cr-Commit-Position: refs/heads/main@{#1555522}
NOKEYCHECK=True
GitOrigin-RevId: d1880c561f245181f16004a3a0fddcaf7d7ebd2a
1 file changed
tree: e7afdc6e60c16fd97a9a1e8db7561f0641f52809
  1. android/
  2. call_stacks/
  3. content/
  4. debug/
  5. demographics/
  6. dwa/
  7. library_support/
  8. net/
  9. private_metrics/
  10. public/
  11. serialization/
  12. structured/
  13. system_session_analyzer/
  14. test/
  15. ui/
  16. android_metrics_helper.cc
  17. android_metrics_helper.h
  18. android_metrics_helper_unittest.cc
  19. android_metrics_provider.cc
  20. android_metrics_provider.h
  21. android_metrics_provider_unittest.cc
  22. BUILD.gn
  23. child_histogram_fetcher_impl.cc
  24. child_histogram_fetcher_impl.h
  25. clean_exit_beacon.cc
  26. clean_exit_beacon.h
  27. clean_exit_beacon_ios.mm
  28. clean_exit_beacon_unittest.cc
  29. client_info.cc
  30. client_info.h
  31. cloned_install_detector.cc
  32. cloned_install_detector.h
  33. cloned_install_detector_unittest.cc
  34. component_metrics_provider.cc
  35. component_metrics_provider.h
  36. component_metrics_provider_unittest.cc
  37. cpu_metrics_provider.cc
  38. cpu_metrics_provider.h
  39. daily_event.cc
  40. daily_event.h
  41. daily_event_unittest.cc
  42. data_use_tracker.cc
  43. data_use_tracker.h
  44. data_use_tracker_unittest.cc
  45. date_changed_helper.cc
  46. date_changed_helper.h
  47. date_changed_helper_unittest.cc
  48. delegating_provider.cc
  49. delegating_provider.h
  50. DEPS
  51. DIR_METADATA
  52. drive_metrics_provider.cc
  53. drive_metrics_provider.h
  54. enabled_state_provider.cc
  55. enabled_state_provider.h
  56. entropy_state.cc
  57. entropy_state.h
  58. entropy_state_provider.cc
  59. entropy_state_provider.h
  60. entropy_state_provider_unittest.cc
  61. entropy_state_unittest.cc
  62. environment_recorder.cc
  63. environment_recorder.h
  64. environment_recorder_unittest.cc
  65. expired_histogram_util.cc
  66. expired_histogram_util.h
  67. expired_histograms_checker.cc
  68. expired_histograms_checker.h
  69. expired_histograms_checker_unittest.cc
  70. field_trials_provider.cc
  71. field_trials_provider.h
  72. field_trials_provider_unittest.cc
  73. file_metrics_provider.cc
  74. file_metrics_provider.h
  75. file_metrics_provider_unittest.cc
  76. generate_expired_histograms_array.gni
  77. gms_metrics_provider.cc
  78. gms_metrics_provider.h
  79. gms_metrics_provider_unittest.cc
  80. histogram_child_process.h
  81. histogram_controller.cc
  82. histogram_controller.h
  83. histogram_encoder.cc
  84. histogram_encoder.h
  85. histogram_encoder_unittest.cc
  86. histogram_subscriber.h
  87. install_date_provider.cc
  88. install_date_provider.h
  89. log_decoder.cc
  90. log_decoder.h
  91. log_decoder_unittest.cc
  92. log_store.h
  93. machine_id_provider.h
  94. machine_id_provider_nonwin.cc
  95. machine_id_provider_nonwin_unittest.cc
  96. machine_id_provider_win.cc
  97. machine_id_provider_win_unittest.cc
  98. metrics_data_validation.cc
  99. metrics_data_validation.h
  100. metrics_data_validation_unittest.cc
  101. metrics_features.cc
  102. metrics_features.h
  103. metrics_log.cc
  104. metrics_log.h
  105. metrics_log_store.cc
  106. metrics_log_store.h
  107. metrics_log_store_unittest.cc
  108. metrics_log_unittest.cc
  109. metrics_log_uploader.h
  110. metrics_logs_event_manager.cc
  111. metrics_logs_event_manager.h
  112. metrics_pref_names.h
  113. metrics_provider.cc
  114. metrics_provider.h
  115. metrics_reporting_default_state.cc
  116. metrics_reporting_default_state.h
  117. metrics_reporting_service.cc
  118. metrics_reporting_service.h
  119. metrics_rotation_scheduler.cc
  120. metrics_rotation_scheduler.h
  121. metrics_scheduler.cc
  122. metrics_scheduler.h
  123. metrics_service.cc
  124. metrics_service.h
  125. metrics_service_accessor.cc
  126. metrics_service_accessor.h
  127. metrics_service_client.cc
  128. metrics_service_client.h
  129. metrics_service_client_unittest.cc
  130. metrics_service_observer.cc
  131. metrics_service_observer.h
  132. metrics_service_observer_unittest.cc
  133. metrics_service_unittest.cc
  134. metrics_shutdown.cc
  135. metrics_shutdown.h
  136. metrics_state_manager.cc
  137. metrics_state_manager.h
  138. metrics_state_manager_unittest.cc
  139. metrics_switches.cc
  140. metrics_switches.h
  141. metrics_upload_scheduler.cc
  142. metrics_upload_scheduler.h
  143. motherboard.cc
  144. motherboard.h
  145. motherboard_metrics_provider.cc
  146. motherboard_metrics_provider.h
  147. motherboard_metrics_provider_unittest.cc
  148. OWNERS
  149. persistent_histograms.cc
  150. persistent_histograms.h
  151. persistent_synthetic_trial_observer.cc
  152. persistent_synthetic_trial_observer.h
  153. persistent_synthetic_trial_observer_unittest.cc
  154. persistent_system_profile.cc
  155. persistent_system_profile.h
  156. persistent_system_profile_unittest.cc
  157. README
  158. reporting_service.cc
  159. reporting_service.h
  160. reporting_service_unittest.cc
  161. sampling_metrics_provider.cc
  162. sampling_metrics_provider.h
  163. server_urls.cc
  164. server_urls.grd
  165. server_urls.h
  166. server_urls_unittest.cc
  167. single_sample_metrics.cc
  168. single_sample_metrics.h
  169. single_sample_metrics_factory_impl.cc
  170. single_sample_metrics_factory_impl.h
  171. single_sample_metrics_factory_impl_unittest.cc
  172. stability_metrics_helper.cc
  173. stability_metrics_helper.h
  174. stability_metrics_helper_unittest.cc
  175. stability_metrics_provider.cc
  176. stability_metrics_provider.h
  177. stability_metrics_provider_unittest.cc
  178. ukm_demographic_metrics_provider.h
  179. unsent_log_store.cc
  180. unsent_log_store.h
  181. unsent_log_store_metrics.cc
  182. unsent_log_store_metrics.h
  183. unsent_log_store_metrics_impl.cc
  184. unsent_log_store_metrics_impl.h
  185. unsent_log_store_metrics_impl_unittest.cc
  186. unsent_log_store_unittest.cc
  187. version_utils.cc
  188. version_utils.h