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 626956c7ecc84603cab1db5d46b7f5b7bff3f99a..520615c4d47675e9d38e14e78debb513bfc08abf 100644
--- a/third_party/WebKit/Source/web/WebEmbeddedWorkerImpl.cpp
+++ b/third_party/WebKit/Source/web/WebEmbeddedWorkerImpl.cpp
@@ -34,6 +34,7 @@
 #include "bindings/core/v8/SourceLocation.h"
 #include "core/dom/Document.h"
 #include "core/dom/SecurityContext.h"
+#include "core/dom/TaskRunnerHelper.h"
 #include "core/frame/csp/ContentSecurityPolicy.h"
 #include "core/inspector/ConsoleMessage.h"
 #include "core/loader/FrameLoadRequest.h"
@@ -272,7 +273,8 @@ void WebEmbeddedWorkerImpl::postTaskToWorkerGlobalScope(
     std::unique_ptr<WTF::CrossThreadClosure> task) {
   if (m_askedToTerminate || !m_workerThread)
     return;
-  m_workerThread->postTask(location, std::move(task));
+  TaskRunnerHelper::get(TaskType::Networking, m_workerThread.get())
+      ->postTask(location, std::move(task));
 }
 
 ThreadableLoadingContext* WebEmbeddedWorkerImpl::getThreadableLoadingContext() {