Experiment with redirecting all BrowserThreads (but UI/IO) to TaskScheduler

content/public/browser/content_browser_client.h

Index: content/public/browser/content_browser_client.h
diff --git a/content/public/browser/content_browser_client.h b/content/public/browser/content_browser_client.h
index 43cf4f405c57249347e43066320026f1573e0266..a6fd6462b3bb9fdf1df1a3fae0953585e3e6114b 100644
--- a/content/public/browser/content_browser_client.h
+++ b/content/public/browser/content_browser_client.h
@@ -798,6 +798,10 @@ class CONTENT_EXPORT ContentBrowserClient {
 
   // Returns the RapporService from the browser process.
   virtual ::rappor::RapporService* GetRapporService();
+
+  // If this returns true, all BrowserThreads (but UI/IO) that support it on
+  // this platform will experimentally be redirected to TaskScheduler.
+  virtual bool RedirectNonUINonIOBrowserThreadsToTaskScheduler();
 };
 
 }  // namespace content