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 5fc25ba79a6b3b5f87cc3162b0e86836b95a8979..fb8241d658cd6ec4575a5d97ec98614c00a79e22 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"
@@ -73,7 +74,8 @@ void ThreadedMessagingProxyBase::PostTaskToWorkerGlobalScope(
     return;
 
   DCHECK(worker_thread_);
-  worker_thread_->PostTask(location, std::move(task));
+  TaskRunnerHelper::Get(TaskType::kNetworking, worker_thread_.get())

[haraken, 2017/04/13 07:03:36]

Why does this use kNetworking?

[nhiroki, 2017/04/13 08:23:50]

Because this function (and PostTaskToLoader) implements WorkerLoaderProxy
interface that is supposed to be called from loading components.

(I found some non-loading functions wrongly call this. I'll fix them in a
separate CL. Also, we could rename this function to clearer name, or change the
interface using new TaskRunnerHelper(GlobalScope))

+      ->PostTask(location, std::move(task));
 }
 
 void ThreadedMessagingProxyBase::PostTaskToLoader(