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

chrome/browser/chrome_content_browser_client.h

 // 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.
 
 #ifndef CHROME_BROWSER_CHROME_CONTENT_BROWSER_CLIENT_H_
 #define CHROME_BROWSER_CHROME_CONTENT_BROWSER_CLIENT_H_
 
 #include <stddef.h>
 
 #include <memory>
@@ skipping 307 matching lines @@
   std::unique_ptr<content::MemoryCoordinatorDelegate>
   GetMemoryCoordinatorDelegate() override;
   ::rappor::RapporService* GetRapporService() override;
 
 #if BUILDFLAG(ENABLE_MEDIA_REMOTING)
   void CreateMediaRemoter(content::RenderFrameHost* render_frame_host,
                           media::mojom::RemotingSourcePtr source,
                           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;
 
  private:
   friend class DisableWebRtcEncryptionFlagTest;
   friend class InProcessBrowserTest;
 
 #if BUILDFLAG(ENABLE_WEBRTC)
   // Copies disable WebRTC encryption switch depending on the channel.
@@ skipping 42 matching lines @@
   // Vector of additional ChromeContentBrowserClientParts.
   // Parts are deleted in the reverse order they are added.
   std::vector<ChromeContentBrowserClientParts*> extra_parts_;
 
   base::WeakPtrFactory<ChromeContentBrowserClient> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ChromeContentBrowserClient);
 };
 
 #endif  // CHROME_BROWSER_CHROME_CONTENT_BROWSER_CLIENT_H_