[ABANDONED] Call Microtask::performCheckpoint for each worker task.

Source/core/workers/WorkerRunLoop.cpp

Index: Source/core/workers/WorkerRunLoop.cpp
diff --git a/Source/core/workers/WorkerRunLoop.cpp b/Source/core/workers/WorkerRunLoop.cpp
index 09c4d05c8af252bb544b2b04e1345f2ce195311b..8ecb4f280630e043411c49e44e39cc9fe82262e9 100644
--- a/Source/core/workers/WorkerRunLoop.cpp
+++ b/Source/core/workers/WorkerRunLoop.cpp
@@ -31,6 +31,7 @@
 #include "config.h"
 #include "core/workers/WorkerRunLoop.h"
 
+#include "core/dom/Microtask.h"
 #include "core/inspector/InspectorInstrumentation.h"
 #include "core/workers/WorkerGlobalScope.h"
 #include "core/workers/WorkerThread.h"
@@ -57,6 +58,8 @@ public:
         WorkerGlobalScope* workerGlobalScope = m_runLoop.context();
         if ((!workerGlobalScope->isClosing() && !m_runLoop.terminated()) || m_task->isCleanupTask())
             m_task->performTask(workerGlobalScope);
+        if (!workerGlobalScope->isClosing() && !m_runLoop.terminated())
+            Microtask::performCheckpoint();
     }
 
 private: