Introduce chrome://flags/#network-prediction-options-for-service-worker

chrome/browser/about_flags.cc

 // 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.
 
 #include "chrome/browser/about_flags.h"
 
 #include <iterator>
 #include <map>
 #include <set>
 #include <utility>
@@ skipping 10 matching lines @@
 #include "base/stl_util.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/task_scheduler/switches.h"
 #include "base/values.h"
 #include "build/build_config.h"
 #include "cc/base/switches.h"
 #include "chrome/browser/experiments/memory_ablation_experiment.h"
 #include "chrome/browser/flag_descriptions.h"
+#include "chrome/browser/net/prediction_options.h"
 #include "chrome/browser/predictors/resource_prefetch_common.h"
 #include "chrome/browser/prerender/prerender_field_trial.h"
 #include "chrome/common/channel_info.h"
 #include "chrome/common/chrome_content_client.h"
 #include "chrome/common/chrome_features.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/features.h"
 #include "chrome/common/pause_tabs_field_trial.h"
 #include "chrome/grit/chromium_strings.h"
 #include "components/autofill/core/browser/autofill_experiments.h"
@@ skipping 765 matching lines @@
 const FeatureEntry::FeatureParam kSpeculativeResourcePrefetchingLearning[] = {
     {predictors::kModeParamName, predictors::kLearningMode}};
 
 const FeatureEntry::FeatureVariation
     kSpeculativeResourcePrefetchingFeatureVariations[] = {
         {"Prefetching", kSpeculativeResourcePrefetchingPrefetching,
          arraysize(kSpeculativeResourcePrefetchingPrefetching), nullptr},
         {"Learning", kSpeculativeResourcePrefetchingLearning,
          arraysize(kSpeculativeResourcePrefetchingLearning), nullptr}};
 
+const FeatureEntry::Choice kNetworkPredictionOptionsForServiceWorkerChoices[] =
+    {
+        {flags_ui::kGenericExperimentChoiceDefault, "", ""},
+        {chrome_browser_net::kPreconnectOnly,
+         switches::kNetworkPredictionOptionsForServiceWorker,
+         chrome_browser_net::kPreconnectOnly},
+        {chrome_browser_net::kStartServiceWorkerAndPreconnect,
+         switches::kNetworkPredictionOptionsForServiceWorker,
+         chrome_browser_net::kStartServiceWorkerAndPreconnect},
+        {chrome_browser_net::kStartServiceWorkerAndDeferPreconnect,
+         switches::kNetworkPredictionOptionsForServiceWorker,
+         chrome_browser_net::kStartServiceWorkerAndDeferPreconnect},
+        {chrome_browser_net::kStartServiceWorkerOnly,
+         switches::kNetworkPredictionOptionsForServiceWorker,
+         chrome_browser_net::kStartServiceWorkerOnly},
+};
+
 #if defined(OS_CHROMEOS) || defined(OS_LINUX) || defined(OS_MACOSX) || \
     defined(OS_WIN)
 const FeatureEntry::FeatureParam kPauseBackgroundTabsMinimalEngagment[] = {
     {pausetabs::kFeatureName, pausetabs::kModeParamMinimal}};
 
 const FeatureEntry::FeatureParam kPauseBackgroundTabsLowEngagment[] = {
     {pausetabs::kFeatureName, pausetabs::kModeParamLow}};
 
 const FeatureEntry::FeatureParam kPauseBackgroundTabsMediumEngagment[] = {
     {pausetabs::kFeatureName, pausetabs::kModeParamMedium}};
@@ skipping 2017 matching lines @@
      FEATURE_VALUE_TYPE(chrome::android::kCustomFeedbackUi)},
 #endif  // OS_ANDROID
 
     {"enable-resource-prefetch", flag_descriptions::kSpeculativePrefetchName,
      flag_descriptions::kSpeculativePrefetchDescription, kOsAll,
      FEATURE_WITH_PARAMS_VALUE_TYPE(
          predictors::kSpeculativeResourcePrefetchingFeature,
          kSpeculativeResourcePrefetchingFeatureVariations,
          "SpeculativeResourcePrefetchingValidation")},
 
+    {"network-prediction-options-for-service-worker",
+     flag_descriptions::kNetworkPredictionOptionsForServiceWorkerName,
+     flag_descriptions::kNetworkPredictionOptionsForServiceWorkerDescription,
+     kOsAll,
+     MULTI_VALUE_TYPE(kNetworkPredictionOptionsForServiceWorkerChoices)},
+
     {"enable-off-main-thread-fetch", flag_descriptions::kOffMainThreadFetchName,
      flag_descriptions::kOffMainThreadFetchDescription, kOsAll,
      FEATURE_VALUE_TYPE(features::kOffMainThreadFetch)},
 
 #if defined(OS_MACOSX)
     {"tab-strip-keyboard-focus", flag_descriptions::kTabStripKeyboardFocusName,
      flag_descriptions::kTabStripKeyboardFocusDescription, kOsMac,
      FEATURE_VALUE_TYPE(features::kTabStripKeyboardFocus)},
 #endif
 
@@ skipping 411 matching lines @@
 const base::HistogramBase::Sample kBadSwitchFormatHistogramId = 0;
 
 const FeatureEntry* GetFeatureEntries(size_t* count) {
   *count = arraysize(kFeatureEntries);
   return kFeatureEntries;
 }
 
 }  // namespace testing
 
 }  // namespace about_flags