Only flag the LayoutObject on CSP error if one is attached

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

Index: third_party/WebKit/Source/core/html/HTMLPlugInElement.cpp
diff --git a/third_party/WebKit/Source/core/html/HTMLPlugInElement.cpp b/third_party/WebKit/Source/core/html/HTMLPlugInElement.cpp
index c48fbe6b0b1492f8f41e49800b154b60cf5ed856..4db763004ca60857e47b8363b211ff08ad421198 100644
--- a/third_party/WebKit/Source/core/html/HTMLPlugInElement.cpp
+++ b/third_party/WebKit/Source/core/html/HTMLPlugInElement.cpp
@@ -555,7 +555,8 @@ bool HTMLPlugInElement::allowedToLoadObject(const KURL& url, const String& mimeT
         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