Revert of Change WokerThread to use a blink::WebThread.

Source/web/WebEmbeddedWorkerImpl.cpp

Index: Source/web/WebEmbeddedWorkerImpl.cpp
diff --git a/Source/web/WebEmbeddedWorkerImpl.cpp b/Source/web/WebEmbeddedWorkerImpl.cpp
index aab92f5f6b072050e8fa9a342b37586dbc147f49..c28bd7802a4b9da135b37a7272218d2c9ab88c91 100644
--- a/Source/web/WebEmbeddedWorkerImpl.cpp
+++ b/Source/web/WebEmbeddedWorkerImpl.cpp
@@ -126,8 +126,7 @@
     {
         if (m_embeddedWorker.m_askedToTerminate || !m_embeddedWorker.m_workerThread)
             return false;
-        m_embeddedWorker.m_workerThread->postTask(task);
-        return !m_embeddedWorker.m_workerThread->terminated();
+        return m_embeddedWorker.m_workerThread->runLoop().postTask(task);
     }
 
 private:
@@ -258,30 +257,30 @@
 void WebEmbeddedWorkerImpl::resumeWorkerContext()
 {
     if (m_workerThread)
-        m_workerThread->postDebuggerTask(createCrossThreadTask(resumeWorkerContextTask, true));
+        m_workerThread->runLoop().postDebuggerTask(createCrossThreadTask(resumeWorkerContextTask, true));
 }
 
 void WebEmbeddedWorkerImpl::attachDevTools()
 {
     if (m_workerThread)
-        m_workerThread->postDebuggerTask(createCrossThreadTask(connectToWorkerContextInspectorTask, true));
+        m_workerThread->runLoop().postDebuggerTask(createCrossThreadTask(connectToWorkerContextInspectorTask, true));
 }
 
 void WebEmbeddedWorkerImpl::reattachDevTools(const WebString& savedState)
 {
-    m_workerThread->postDebuggerTask(createCrossThreadTask(reconnectToWorkerContextInspectorTask, String(savedState)));
+    m_workerThread->runLoop().postDebuggerTask(createCrossThreadTask(reconnectToWorkerContextInspectorTask, String(savedState)));
 }
 
 void WebEmbeddedWorkerImpl::detachDevTools()
 {
-    m_workerThread->postDebuggerTask(createCrossThreadTask(disconnectFromWorkerContextInspectorTask, true));
+    m_workerThread->runLoop().postDebuggerTask(createCrossThreadTask(disconnectFromWorkerContextInspectorTask, true));
 }
 
 void WebEmbeddedWorkerImpl::dispatchDevToolsMessage(const WebString& message)
 {
     if (m_askedToTerminate)
         return;
-    m_workerThread->postDebuggerTask(createCrossThreadTask(dispatchOnInspectorBackendTask, String(message)));
+    m_workerThread->runLoop().postDebuggerTask(createCrossThreadTask(dispatchOnInspectorBackendTask, String(message)));
     m_workerThread->interruptAndDispatchInspectorCommands();
 }