Introduce WorkerBackingThread

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

Index: third_party/WebKit/Source/core/workers/WorkerThreadTest.cpp
diff --git a/third_party/WebKit/Source/core/workers/WorkerThreadTest.cpp b/third_party/WebKit/Source/core/workers/WorkerThreadTest.cpp
index ee004373e27cb1feb36b7c5d63f1aaac245ad1ca..d6197f7432e1a02fe54c799b5f94e03a40630def 100644
--- a/third_party/WebKit/Source/core/workers/WorkerThreadTest.cpp
+++ b/third_party/WebKit/Source/core/workers/WorkerThreadTest.cpp
@@ -7,6 +7,7 @@
 #include "bindings/core/v8/ScriptCallStack.h"
 #include "bindings/core/v8/V8GCController.h"
 #include "core/inspector/ConsoleMessage.h"
+#include "core/workers/WorkerBackingThread.h"
 #include "core/workers/WorkerReportingProxy.h"
 #include "core/workers/WorkerThreadStartupData.h"
 #include "platform/NotImplemented.h"
@@ -100,25 +101,13 @@ public:
     WorkerThreadForTest(
         WorkerLoaderProxyProvider* mockWorkerLoaderProxyProvider,
         WorkerReportingProxy& mockWorkerReportingProxy)
-        : WorkerThread(WorkerLoaderProxy::create(mockWorkerLoaderProxyProvider), mockWorkerReportingProxy)
-        , m_thread(WebThreadSupportingGC::create("Test thread"))
+        : WorkerThread(WorkerLoaderProxy::create(mockWorkerLoaderProxyProvider), mockWorkerReportingProxy, WorkerBackingThread::create("Test thread"))
         , m_scriptLoadedEvent(adoptPtr(new WaitableEvent()))
     {
     }
 
     ~WorkerThreadForTest() override { }
 
-    // WorkerThread implementation:
-    WebThreadSupportingGC& backingThread() override
-    {
-        return *m_thread;
-    }
-    void willDestroyIsolate() override
-    {
-        V8GCController::collectAllGarbageForTesting(v8::Isolate::GetCurrent());
-        WorkerThread::willDestroyIsolate();
-    }
-
     PassRefPtrWillBeRawPtr<WorkerGlobalScope> createWorkerGlobalScope(PassOwnPtr<WorkerThreadStartupData> startupData) override
     {
         return adoptRefWillBeNoop(new FakeWorkerGlobalScope(startupData->m_scriptURL, startupData->m_userAgent, this, startupData->m_starterOriginPrivilegeData.release(), startupData->m_workerClients.release()));
@@ -135,7 +124,6 @@ public:
     }
 
 private:
-    OwnPtr<WebThreadSupportingGC> m_thread;
     OwnPtr<WaitableEvent> m_scriptLoadedEvent;
 };