Worker: Introduce per-global-scope task scheduler

third_party/WebKit/Source/web/WebEmbeddedWorkerImpl.cpp

Index: third_party/WebKit/Source/web/WebEmbeddedWorkerImpl.cpp
diff --git a/third_party/WebKit/Source/web/WebEmbeddedWorkerImpl.cpp b/third_party/WebKit/Source/web/WebEmbeddedWorkerImpl.cpp
index 6acd6833d14aa1989cea9188bbb255a3c6f07ea9..52644c12540dfe68a4134db5f0343ead2b08e871 100644
--- a/third_party/WebKit/Source/web/WebEmbeddedWorkerImpl.cpp
+++ b/third_party/WebKit/Source/web/WebEmbeddedWorkerImpl.cpp
@@ -45,6 +45,7 @@
 #include "core/workers/WorkerInspectorProxy.h"
 #include "core/workers/WorkerLoaderProxy.h"
 #include "core/workers/WorkerScriptLoader.h"
+#include "core/workers/WorkerTaskRunners.h"
 #include "core/workers/WorkerThreadStartupData.h"
 #include "modules/serviceworkers/ServiceWorkerContainerClient.h"
 #include "modules/serviceworkers/ServiceWorkerThread.h"
@@ -274,7 +275,9 @@ void WebEmbeddedWorkerImpl::PostTaskToWorkerGlobalScope(
     std::unique_ptr<WTF::CrossThreadClosure> task) {
   if (asked_to_terminate_ || !worker_thread_)
     return;
-  worker_thread_->PostTask(location, std::move(task));
+  worker_thread_->GetWorkerTaskRunners()
+      ->Get(TaskType::kNetworking)
+      ->PostTask(location, std::move(task));
 }
 
 ThreadableLoadingContext* WebEmbeddedWorkerImpl::GetThreadableLoadingContext() {