Split browser-specific and generic code in components/task_scheduler_util/.

ios/chrome/browser/ios_chrome_main_parts.mm

Index: ios/chrome/browser/ios_chrome_main_parts.mm
diff --git a/ios/chrome/browser/ios_chrome_main_parts.mm b/ios/chrome/browser/ios_chrome_main_parts.mm
index b225c56fc5e1e12c4355d923c511aecc7e71ef4c..a3ba139764371d1c063bd70e842bd0d7f464b1fe 100644
--- a/ios/chrome/browser/ios_chrome_main_parts.mm
+++ b/ios/chrome/browser/ios_chrome_main_parts.mm
@@ -31,11 +31,11 @@
 #include "components/prefs/json_pref_store.h"
 #include "components/prefs/pref_service.h"
 #include "components/rappor/rappor_service_impl.h"
-#include "components/task_scheduler_util/initialization/browser_util.h"
-#include "components/task_scheduler_util/variations/browser_variations_util.h"
+#include "components/task_scheduler_util/browser.h"
 #include "components/translate/core/browser/translate_download_manager.h"
 #include "components/variations/field_trial_config/field_trial_util.h"
 #include "components/variations/service/variations_service.h"
+#include "components/variations/variations_associated_data.h"
 #include "components/variations/variations_http_header_provider.h"
 #include "components/variations/variations_switches.h"
 #include "ios/chrome/browser/about_flags.h"
@@ -73,59 +73,25 @@
 
 namespace {
 
-std::vector<base::SchedulerWorkerPoolParams>
-GetDefaultSchedulerWorkerPoolParams() {
-  using StandbyThreadPolicy =
-      base::SchedulerWorkerPoolParams::StandbyThreadPolicy;
-  constexpr size_t kNumWorkerPoolsDefined =
-      sizeof(task_scheduler_util::initialization::
-                 BrowserWorkerPoolsConfiguration) /
-      sizeof(
-          task_scheduler_util::initialization::SingleWorkerPoolConfiguration);
-  static_assert(kNumWorkerPoolsDefined == 4,
-                "Expected 4 worker pools in BrowserWorkerPoolsConfiguration");
-  task_scheduler_util::initialization::BrowserWorkerPoolsConfiguration config;
-  constexpr size_t kSizeAssignedFields =
-      sizeof(config.background.threads) +
-      sizeof(config.background.detach_period) +
-      sizeof(config.background.standby_thread_policy);
-  static_assert(kSizeAssignedFields == sizeof(config.background),
-                "Not all fields were assigned");
-  config.background.standby_thread_policy = StandbyThreadPolicy::ONE;
-  config.background.threads =
-      base::RecommendedMaxNumberOfThreadsInPool(2, 8, 0.1, 0);
-  config.background.detach_period = base::TimeDelta::FromSeconds(30);
-
-  config.background_file_io.standby_thread_policy = StandbyThreadPolicy::ONE;
-  config.background_file_io.threads =
-      base::RecommendedMaxNumberOfThreadsInPool(2, 8, 0.1, 0);
-  config.background_file_io.detach_period = base::TimeDelta::FromSeconds(30);
-
-  config.foreground.standby_thread_policy = StandbyThreadPolicy::ONE;
-  config.foreground.threads =
-      base::RecommendedMaxNumberOfThreadsInPool(3, 8, 0.3, 0);
-  config.foreground.detach_period = base::TimeDelta::FromSeconds(30);
-
-  config.foreground_file_io.standby_thread_policy = StandbyThreadPolicy::ONE;
-  config.foreground_file_io.threads =
-      base::RecommendedMaxNumberOfThreadsInPool(3, 8, 0.3, 0);
-  config.foreground_file_io.detach_period = base::TimeDelta::FromSeconds(30);
-  return task_scheduler_util::initialization::
-      BrowserWorkerPoolConfigurationToSchedulerWorkerPoolParams(config);
-}
-
 void InitializeTaskScheduler() {
-  std::vector<base::SchedulerWorkerPoolParams> params_vector =
-      task_scheduler_util::variations::
-          GetBrowserSchedulerWorkerPoolParamsFromVariations();
-  if (params_vector.empty())
-    params_vector = GetDefaultSchedulerWorkerPoolParams();
+  std::map<std::string, std::string> variation_params;
+  variations::GetVariationParams("BrowserScheduler", &variation_params);
+  auto params_vector =
+      task_scheduler_util::GetBrowserWorkerPoolParams(variation_params);
+  if (params_vector.empty()) {
+    variation_params["Background"] = "2;8;0.1;0;30000";
+    variation_params["BackgroundFileIO"] = "2;8;0.1;0;30000";
+    variation_params["Foreground"] = "3;8;0.3;0;30000";
+    variation_params["ForegroundFileIO"] = "3;8;0.3;0;30000";
+    params_vector =
+        task_scheduler_util::GetBrowserWorkerPoolParams(variation_params);
+  }
+  DCHECK(!params_vector.empty());
 
   base::TaskScheduler::CreateAndSetDefaultTaskScheduler(
-      params_vector, base::Bind(&task_scheduler_util::initialization::
-                                    BrowserWorkerPoolIndexForTraits));
-  task_scheduler_util::variations::
-      MaybePerformBrowserTaskSchedulerRedirection();
+      params_vector,
+      base::Bind(&task_scheduler_util::BrowserWorkerPoolIndexForTraits));
+  task_scheduler_util::MaybePerformBrowserTaskSchedulerRedirection();
 }
 
 }  // namespace