Worker: Introduce per-global-scope task scheduler

third_party/WebKit/Source/core/workers/ThreadedMessagingProxyBase.cpp

Index: third_party/WebKit/Source/core/workers/ThreadedMessagingProxyBase.cpp
diff --git a/third_party/WebKit/Source/core/workers/ThreadedMessagingProxyBase.cpp b/third_party/WebKit/Source/core/workers/ThreadedMessagingProxyBase.cpp
index 9ae83beb1675eea75c6bc8ef75f6e3aae2d73d85..830a7c9b253d67686dfcdda12dc94bf97de1056f 100644
--- a/third_party/WebKit/Source/core/workers/ThreadedMessagingProxyBase.cpp
+++ b/third_party/WebKit/Source/core/workers/ThreadedMessagingProxyBase.cpp
@@ -6,6 +6,7 @@
 
 #include "bindings/core/v8/SourceLocation.h"
 #include "core/dom/Document.h"
+#include "core/dom/TaskRunnerHelper.h"
 #include "core/frame/Deprecation.h"
 #include "core/loader/DocumentLoader.h"
 #include "core/loader/ThreadableLoadingContext.h"
@@ -72,7 +73,8 @@ void ThreadedMessagingProxyBase::postTaskToWorkerGlobalScope(
     return;
 
   DCHECK(m_workerThread);
-  m_workerThread->postTask(location, std::move(task));
+  TaskRunnerHelper::get(TaskType::Networking, m_workerThread.get())
+      ->postTask(location, std::move(task));
 }
 
 void ThreadedMessagingProxyBase::postTaskToLoader(