WorkerThread: drop unnecessary interfaces to simplify

Source/web/WebSharedWorkerImpl.cpp

Index: Source/web/WebSharedWorkerImpl.cpp
diff --git a/Source/web/WebSharedWorkerImpl.cpp b/Source/web/WebSharedWorkerImpl.cpp
index 1a18be73018955ef138761cb20f94a73477a47f6..df9c5ad7a277300a7f7f05c02dc52ec6e6a82c76 100644
--- a/Source/web/WebSharedWorkerImpl.cpp
+++ b/Source/web/WebSharedWorkerImpl.cpp
@@ -77,6 +77,8 @@
 
 namespace blink {
 
+// TODO(toyoshim): Share implementation with WebEmbeddedWorkerImpl as much as
+// possible.
 // A thin wrapper for one-off script loading.
 class WebSharedWorkerImpl::Loader : public WorkerScriptLoaderClient {
 public:
@@ -183,6 +185,7 @@ WebSharedWorkerImpl::~WebSharedWorkerImpl()
         m_loaderProxy->detachProvider(this);
 }
 
+// TODO(toyoshim): Rename to terminateWorkerThread().
 void WebSharedWorkerImpl::stopWorkerThread()
 {
     if (m_askedToTerminate)
@@ -197,7 +200,7 @@ void WebSharedWorkerImpl::stopWorkerThread()
         return;
     }
     if (m_workerThread)
-        m_workerThread->stop();
+        m_workerThread->terminate();
     m_workerInspectorProxy->workerThreadTerminated();
 }