Set the target type when creating the request for main resource

Source/web/WebEmbeddedWorkerImpl.cpp

Index: Source/web/WebEmbeddedWorkerImpl.cpp
diff --git a/Source/web/WebEmbeddedWorkerImpl.cpp b/Source/web/WebEmbeddedWorkerImpl.cpp
index 25a22ce17c7b41314c3c222d42bc02e0d8e97b35..ced63cd654a7c6d20de49dd0fd72d38edc384e0b 100644
--- a/Source/web/WebEmbeddedWorkerImpl.cpp
+++ b/Source/web/WebEmbeddedWorkerImpl.cpp
@@ -281,7 +281,9 @@ void WebEmbeddedWorkerImpl::prepareShadowPageForLoader()
     CString content("");
     int length = static_cast<int>(content.length());
     RefPtr<SharedBuffer> buffer(SharedBuffer::create(content.data(), length));
-    webFrame->frame()->loader().load(FrameLoadRequest(0, ResourceRequest(m_workerStartData.scriptURL), SubstituteData(buffer, "text/html", "UTF-8", KURL())));
+    ResourceRequest request = ResourceRequest::createMainResourceRequest(
+        m_workerStartData.scriptURL, !webFrame->parent());
+    webFrame->frame()->loader().load(FrameLoadRequest(0, request, SubstituteData(buffer, "text/html", "UTF-8", KURL())));
 }
 
 void WebEmbeddedWorkerImpl::willSendRequest(