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

chrome/browser/chrome_content_browser_client.h

Index: chrome/browser/chrome_content_browser_client.h
diff --git a/chrome/browser/chrome_content_browser_client.h b/chrome/browser/chrome_content_browser_client.h
index dae52309fff5cdb8c7d5764e7f99a000f0f5cb2f..0eaaba97ec4f6b42af8b97a6796eba4009b59e16 100644
--- a/chrome/browser/chrome_content_browser_client.h
+++ b/chrome/browser/chrome_content_browser_client.h
@@ -325,10 +325,8 @@ class ChromeContentBrowserClient : public content::ContentBrowserClient {
                           media::mojom::RemoterRequest request) final;
 #endif  // BUILDFLAG(ENABLE_MEDIA_REMOTING)
 
-  void GetTaskSchedulerInitializationParams(
-      std::vector<base::SchedulerWorkerPoolParams>* params_vector,
-      base::TaskScheduler::WorkerPoolIndexForTraitsCallback*
-          index_to_traits_callback) override;
+  std::unique_ptr<base::TaskSchedulerInitParams> GetTaskSchedulerInitParams()
+      override;
   void PerformExperimentalTaskSchedulerRedirections() override;
   bool ShouldRedirectDOMStorageTaskRunner() override;
   bool RedirectNonUINonIOBrowserThreadsToTaskScheduler() override;