Only flag the LayoutObject on CSP error if one is attached

third_party/WebKit/Source/core/html/HTMLPlugInElement.cpp

 /**
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Stefan Schimanski (1Stein@gmx.de)
  * Copyright (C) 2004, 2005, 2006 Apple Computer, Inc.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
@@ skipping 550 matching lines @@
     if (!document().getSecurityOrigin()->canDisplay(url)) {
         FrameLoader::reportLocalLoadFailed(frame, url.getString());
         return false;
     }
 
     AtomicString declaredMimeType = document().isPluginDocument() && document().localOwner() ?
         document().localOwner()->fastGetAttribute(HTMLNames::typeAttr) :
         fastGetAttribute(HTMLNames::typeAttr);
     if (!document().contentSecurityPolicy()->allowObjectFromSource(url)
         || !document().contentSecurityPolicy()->allowPluginTypeForDocument(document(), mimeType, declaredMimeType, url)) {
-        layoutEmbeddedItem().setPluginUnavailabilityReason(LayoutEmbeddedObject::PluginBlockedByContentSecurityPolicy);
+        if (LayoutEmbeddedItem layoutItem = layoutEmbeddedItem())
+            layoutItem.setPluginUnavailabilityReason(LayoutEmbeddedObject::PluginBlockedByContentSecurityPolicy);
         return false;
     }
     // If the URL is empty, a plugin could still be instantiated if a MIME-type
     // is specified.
     return (!mimeType.isEmpty() && url.isEmpty()) || !MixedContentChecker::shouldBlockFetch(frame, WebURLRequest::RequestContextObject, WebURLRequest::FrameTypeNone, ResourceRequest::RedirectStatus::NoRedirect, url);
 }
 
 bool HTMLPlugInElement::allowedToLoadPlugin(const KURL& url, const String& mimeType)
 {
     if (document().isSandboxed(SandboxPlugins)) {
@@ skipping 21 matching lines @@
 
 void HTMLPlugInElement::lazyReattachIfNeeded()
 {
     if (!useFallbackContent() && needsWidgetUpdate() && layoutObject() && !isImageType()) {
         lazyReattachIfAttached();
         setPersistedPluginWidget(nullptr);
     }
 }
 
 } // namespace blink