Worker: Introduce per-global-scope task scheduler

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

Index: third_party/WebKit/Source/core/workers/InProcessWorkerMessagingProxy.cpp
diff --git a/third_party/WebKit/Source/core/workers/InProcessWorkerMessagingProxy.cpp b/third_party/WebKit/Source/core/workers/InProcessWorkerMessagingProxy.cpp
index bc0a6f1b63f17fd8c202be97cba07254fefc7c8c..5b3a4ce641a1d93632c44a5a0d16d25e57fac4c0 100644
--- a/third_party/WebKit/Source/core/workers/InProcessWorkerMessagingProxy.cpp
+++ b/third_party/WebKit/Source/core/workers/InProcessWorkerMessagingProxy.cpp
@@ -30,6 +30,7 @@
 #include <memory>
 #include "core/dom/Document.h"
 #include "core/dom/SecurityContext.h"
+#include "core/dom/TaskRunnerHelper.h"
 #include "core/events/ErrorEvent.h"
 #include "core/events/MessageEvent.h"
 #include "core/frame/LocalFrame.h"
@@ -148,7 +149,8 @@ void InProcessWorkerMessagingProxy::PostMessageToWorkerGlobalScope(
         CrossThreadUnretained(&WorkerObjectProxy()), std::move(message),
         WTF::Passed(std::move(channels)),
         CrossThreadUnretained(GetWorkerThread()));
-    GetWorkerThread()->PostTask(BLINK_FROM_HERE, std::move(task));
+    TaskRunnerHelper::Get(TaskType::kPostedMessage, GetWorkerThread())
+        ->PostTask(BLINK_FROM_HERE, std::move(task));
   } else {
     queued_early_tasks_.push_back(
         QueuedTask{std::move(message), std::move(channels)});
@@ -197,7 +199,8 @@ void InProcessWorkerMessagingProxy::WorkerThreadCreated() {
         queued_task.message.Release(),
         WTF::Passed(std::move(queued_task.channels)),
         CrossThreadUnretained(GetWorkerThread()));
-    GetWorkerThread()->PostTask(BLINK_FROM_HERE, std::move(task));
+    TaskRunnerHelper::Get(TaskType::kPostedMessage, GetWorkerThread())
+        ->PostTask(BLINK_FROM_HERE, std::move(task));
   }
   queued_early_tasks_.Clear();
 }