Remove the allow-displaying-mixed-content setting from Blink.

third_party/WebKit/Source/web/WebEmbeddedWorkerImpl.cpp

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 271 matching lines @@
     DCHECK(!m_webView);
     m_webView = WebView::create(nullptr, WebPageVisibilityStateVisible);
     WebSettings* settings = m_webView->settings();
     // FIXME: http://crbug.com/363843. This needs to find a better way to
     // not create graphics layers.
     settings->setAcceleratedCompositingEnabled(false);
     // Currently we block all mixed-content requests from a ServiceWorker.
     // FIXME: When we support FetchEvent.default(), we should relax this
     // restriction.
     settings->setStrictMixedContentChecking(true);
-    settings->setAllowDisplayOfInsecureContent(false);
     settings->setAllowRunningOfInsecureContent(false);
     settings->setDataSaverEnabled(m_workerStartData.dataSaverEnabled);
     m_mainFrame = toWebLocalFrameImpl(WebLocalFrame::create(WebTreeScopeType::Document, this));
     m_webView->setMainFrame(m_mainFrame.get());
     m_mainFrame->setDevToolsAgentClient(this);
 
     // If we were asked to wait for debugger then it is the good time to do that.
     m_workerContextClient->workerReadyForInspection();
     if (m_workerStartData.waitForDebuggerMode == WebEmbeddedWorkerStartData::WaitForDebugger) {
         m_waitingForDebuggerState = WaitingForDebugger;
@@ skipping 144 matching lines @@
     m_mainThreadTaskRunners = ParentFrameTaskRunners::create(nullptr);
 
     m_workerGlobalScopeProxy = ServiceWorkerGlobalScopeProxy::create(*this, *document, *m_workerContextClient);
     m_loaderProxy = WorkerLoaderProxy::create(this);
     m_workerThread = ServiceWorkerThread::create(m_loaderProxy, *m_workerGlobalScopeProxy);
     m_workerThread->start(std::move(startupData));
     m_workerInspectorProxy->workerThreadCreated(document, m_workerThread.get(), scriptURL);
 }
 
 } // namespace blink