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

content/public/renderer/content_renderer_client.h

Index: content/public/renderer/content_renderer_client.h
diff --git a/content/public/renderer/content_renderer_client.h b/content/public/renderer/content_renderer_client.h
index 78543f883ce061fd47b90459db6f184551651c57..c5117a28840c33536d4ac6601079234dc104a7f8 100644
--- a/content/public/renderer/content_renderer_client.h
+++ b/content/public/renderer/content_renderer_client.h
@@ -29,7 +29,6 @@ class SkBitmap;
 
 namespace base {
 class FilePath;
-class SchedulerWorkerPoolParams;
 }
 
 namespace blink {
@@ -359,12 +358,10 @@ class CONTENT_EXPORT ContentRendererClient {
   // An empty URL is returned if the URL is not overriden.
   virtual GURL OverrideFlashEmbedWithHTML(const GURL& url);
 
-  // Provides parameters for initializing the global task scheduler. If
-  // |params_vector| is left empty, default parameters are used.
-  virtual void GetTaskSchedulerInitializationParams(
-      std::vector<base::SchedulerWorkerPoolParams>* params_vector,
-      base::TaskScheduler::WorkerPoolIndexForTraitsCallback*
-          index_to_traits_callback) {}
+  // Provides parameters for initializing the global task scheduler. Default
+  // params are used if this returns nullptr.
+  virtual std::unique_ptr<base::TaskSchedulerInitParams>
+  GetTaskSchedulerInitParams();
 
   // Returns true if the media pipeline can be suspended, or false otherwise.
   virtual bool AllowMediaSuspend();