Initialize TaskScheduler in renderers.

content/public/renderer/content_renderer_client.cc

Index: content/public/renderer/content_renderer_client.cc
diff --git a/content/public/renderer/content_renderer_client.cc b/content/public/renderer/content_renderer_client.cc
index f35db62b9fb8d75d86a0a384a7ebac1581deead6..fb5c2ccb463d76021ec32a5f14bca594dd97c2c6 100644
--- a/content/public/renderer/content_renderer_client.cc
+++ b/content/public/renderer/content_renderer_client.cc
@@ -44,6 +44,14 @@ bool ContentRendererClient::ShouldSuppressErrorPage(RenderFrame* render_frame,
   return false;
 }
 
+bool ContentRendererClient::ShouldInitializeTaskScheduler(
+    std::vector<base::SchedulerWorkerPoolParams>* worker_pool_params_vector,
+    base::Callback<size_t(const base::TaskTraits& traits)>*
+        worker_pool_index_for_traits_callback,
+    bool* should_redirect_sequenced_worker_pool) {
+  return false;
+}
+
 void ContentRendererClient::DeferMediaLoad(
     RenderFrame* render_frame,
     bool has_played_media_before,