The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/e47eade042c947d577a446629f6bc09806ec4f1c

commit e47eade042c947d577a446629f6bc09806ec4f1c
Author: Alexandr Ilin <alexilin@chromium.org>
Date: Wed Sep 12 14:38:54 2018

predictors: LoadingPredictor config cleanup

This CL removes the code used to configure SpeculativePreconnect experiment and
simplifies LoadingPredictor configuration states.

The kSpeculativePreconnectFeature is kept untouched since it's used to disable
the feature in some browser tests and it may be useful as a kill switch.

Bug: 882895
Change-Id: I93e20622fa823599fa1ffd105806d7f8f6e2956a
Reviewed-on: https://chromium-review.googlesource.com/1219866
Reviewed-by: Benoit L <lizeb@chromium.org>
Reviewed-by: Charlie Harrison <csharrison@chromium.org>
Commit-Queue: Alexandr Ilin <alexilin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#590674}
[modify] https://crrev.com/e47eade042c947d577a446629f6bc09806ec4f1c/chrome/browser/about_flags.cc
[modify] https://crrev.com/e47eade042c947d577a446629f6bc09806ec4f1c/chrome/browser/flag_descriptions.cc
[modify] https://crrev.com/e47eade042c947d577a446629f6bc09806ec4f1c/chrome/browser/flag_descriptions.h
[modify] https://crrev.com/e47eade042c947d577a446629f6bc09806ec4f1c/chrome/browser/page_load_metrics/observers/loading_predictor_page_load_metrics_observer_unittest.cc
[modify] https://crrev.com/e47eade042c947d577a446629f6bc09806ec4f1c/chrome/browser/predictors/loading_data_collector.cc
[modify] https://crrev.com/e47eade042c947d577a446629f6bc09806ec4f1c/chrome/browser/predictors/loading_predictor.cc
[modify] https://crrev.com/e47eade042c947d577a446629f6bc09806ec4f1c/chrome/browser/predictors/loading_predictor_config.cc
[modify] https://crrev.com/e47eade042c947d577a446629f6bc09806ec4f1c/chrome/browser/predictors/loading_predictor_config.h
[modify] https://crrev.com/e47eade042c947d577a446629f6bc09806ec4f1c/chrome/browser/predictors/loading_predictor_config_unittest.cc
[modify] https://crrev.com/e47eade042c947d577a446629f6bc09806ec4f1c/chrome/browser/predictors/loading_predictor_factory.cc
[modify] https://crrev.com/e47eade042c947d577a446629f6bc09806ec4f1c/chrome/browser/predictors/loading_predictor_unittest.cc
[modify] https://crrev.com/e47eade042c947d577a446629f6bc09806ec4f1c/chrome/browser/predictors/loading_test_util.cc
[modify] https://crrev.com/e47eade042c947d577a446629f6bc09806ec4f1c/chrome/browser/predictors/preconnect_manager.cc
[modify] https://crrev.com/e47eade042c947d577a446629f6bc09806ec4f1c/chrome/browser/predictors/predictor_database.cc
[modify] https://crrev.com/e47eade042c947d577a446629f6bc09806ec4f1c/chrome/browser/predictors/resource_prefetch_predictor.cc