[reference - do not submit] Always create four pools in TaskSchedulerImpl.

chrome/browser/chrome_content_browser_client.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/chrome_content_browser_client.h"
 
 #include <map>
 #include <set>
 #include <utility>
 #include <vector>
@@ skipping 3517 matching lines @@
 #else
   // Chrome's media remoting implementation depends on the Media Router
   // infrastructure to identify remote sinks and provide the user interface for
   // sink selection. In the case where the Media Router is not present, simply
   // drop the interface request. This will prevent code paths for media remoting
   // in the renderer process from activating.
 #endif
 }
 #endif  // BUILDFLAG(ENABLE_MEDIA_REMOTING)
 
-void ChromeContentBrowserClient::GetTaskSchedulerInitializationParams(
-    std::vector<base::SchedulerWorkerPoolParams>* params_vector,
-    base::TaskScheduler::WorkerPoolIndexForTraitsCallback*
-        index_to_traits_callback) {
-  DCHECK(params_vector);
-  DCHECK(index_to_traits_callback);
-  // If this call fails, content will fall back to the default params.
-  *params_vector =
-      task_scheduler_util::GetBrowserWorkerPoolParamsFromVariations();
-  *index_to_traits_callback =
-      base::Bind(&task_scheduler_util::BrowserWorkerPoolIndexForTraits);
+std::unique_ptr<base::TaskSchedulerInitParams>
+ChromeContentBrowserClient::GetTaskSchedulerInitParams() {
+  return task_scheduler_util::GetBrowserTaskSchedulerInitParamsFromVariations();
 }
 
 void ChromeContentBrowserClient::
     PerformExperimentalTaskSchedulerRedirections() {
   task_scheduler_util::MaybePerformBrowserTaskSchedulerRedirection();
 }
 
 bool ChromeContentBrowserClient::ShouldRedirectDOMStorageTaskRunner() {
   return variations::GetVariationParamValue(
              "BrowserScheduler", "RedirectDOMStorageTaskRunner") == "true";
 }
 
 bool ChromeContentBrowserClient::
     RedirectNonUINonIOBrowserThreadsToTaskScheduler() {
   return variations::GetVariationParamValue(
              "BrowserScheduler", "RedirectNonUINonIOBrowserThreads") == "true";
 }
 
 // static
 void ChromeContentBrowserClient::SetDefaultQuotaSettingsForTesting(
     const storage::QuotaSettings* settings) {
   g_default_quota_settings = settings;
 }