Implement Referrer-Policy header for workers

third_party/WebKit/Source/web/WebEmbeddedWorkerImpl.cpp

Index: third_party/WebKit/Source/web/WebEmbeddedWorkerImpl.cpp
diff --git a/third_party/WebKit/Source/web/WebEmbeddedWorkerImpl.cpp b/third_party/WebKit/Source/web/WebEmbeddedWorkerImpl.cpp
index 3cf2fe172c05be0e8a117e52b7977bf6bfbc530a..66977e88796468fd53b77ecfa28cc9da0b3f32ea 100644
--- a/third_party/WebKit/Source/web/WebEmbeddedWorkerImpl.cpp
+++ b/third_party/WebKit/Source/web/WebEmbeddedWorkerImpl.cpp
@@ -412,6 +412,8 @@ void WebEmbeddedWorkerImpl::startWorkerThread()
 
     // We need to set the CSP to both the shadow page's document and the ServiceWorkerGlobalScope.
     document->initContentSecurityPolicy(m_mainScriptLoader->releaseContentSecurityPolicy());
+    if (!m_mainScriptLoader->referrerPolicy().isNull())
+        document->parseAndSetReferrerPolicy(m_mainScriptLoader->referrerPolicy());
 
     KURL scriptURL = m_mainScriptLoader->url();
     WorkerThreadStartMode startMode = m_workerInspectorProxy->workerStartMode(document);
@@ -423,6 +425,7 @@ void WebEmbeddedWorkerImpl::startWorkerThread()
         m_mainScriptLoader->releaseCachedMetadata(),
         startMode,
         document->contentSecurityPolicy()->headers().get(),
+        m_mainScriptLoader->referrerPolicy(),
         starterOrigin,
         workerClients,
         m_mainScriptLoader->responseAddressSpace(),