Add TaskScheduler initialization arguments to ChildProcess.

content/renderer/render_process_impl.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 CONTENT_RENDERER_RENDER_PROCESS_IMPL_H_
 #define CONTENT_RENDERER_RENDER_PROCESS_IMPL_H_
 
+#include <memory>
+#include <vector>
+
 #include "base/macros.h"
+#include "base/task_scheduler/scheduler_worker_pool_params.h"
+#include "base/task_scheduler/task_scheduler.h"
 #include "content/renderer/render_process.h"
 
 namespace content {
 
 // Implementation of the RenderProcess interface for the regular browser.
 // See also MockRenderProcess which implements the active "RenderProcess" when
 // running under certain unit tests.
 class RenderProcessImpl : public RenderProcess {
  public:
-  RenderProcessImpl();
   ~RenderProcessImpl() override;
 
+  // Creates and returns a RenderProcessImpl instance.
+  //
+  // RenderProcessImpl is created via a static method instead of a simple
+  // constructor because non-trivial calls must be made to get the arguments
+  // required by constructor of the base class.
+  static std::unique_ptr<RenderProcess> Create();
+
   // RenderProcess implementation.
   void AddBindings(int bindings) override;
   int GetEnabledBindings() const override;
 
  private:
-  void InitializeTaskScheduler() override;
+  RenderProcessImpl(
+      const std::vector<base::SchedulerWorkerPoolParams>& worker_pool_params,
+      base::TaskScheduler::WorkerPoolIndexForTraitsCallback
+          worker_pool_index_for_traits_callback);
 
   // Bitwise-ORed set of extra bindings that have been enabled anywhere in this
   // process.  See BindingsPolicy for details.
   int enabled_bindings_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderProcessImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_RENDER_PROCESS_IMPL_H_