Fire error events for a variety of script and style failures.

Source/core/html/HTMLLinkElement.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2003, 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2009 Rob Buis (rwlbuis@gmail.com)
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
@@ skipping 725 matching lines @@
         // Load stylesheets that are not needed for the rendering immediately with low priority.
         FetchRequest request = builder.build(blocking);
         AtomicString crossOriginMode = m_owner->fastGetAttribute(HTMLNames::crossoriginAttr);
         if (!crossOriginMode.isNull()) {
             request.setCrossOriginAccessControl(document().securityOrigin(), crossOriginMode);
             setFetchFollowingCORS();
         }
         setResource(document().fetcher()->fetchCSSStyleSheet(request));
 
         if (!resource()) {
-            // The request may have been denied if (for example) the stylesheet is local and the document is remote.
+            // The request may have been denied if (for example) the stylesheet is local and the document is remote, or if there was a Content Security Policy Failure.
             m_loading = false;
             removePendingSheet();
+            notifyLoadedSheetAndAllCriticalSubresources(true);

[Mike West, 2015/03/26 04:41:08]

Nit: We should totally change this bool to an enum. It makes no sense without
checking the header. :/

[jww, 2015/03/26 21:04:17]

Done.

         }
     } else if (m_sheet) {
         // we no longer contain a stylesheet, e.g. perhaps rel or type was changed
         RefPtrWillBeRawPtr<StyleSheet> removedSheet = m_sheet.get();
         clearSheet();
         document().removedStyleSheet(removedSheet.get());
     }
 }
 
 void LinkStyle::setSheetTitle(const String& title)
@@ skipping 11 matching lines @@
         removePendingSheet();
 }
 
 DEFINE_TRACE(LinkStyle)
 {
     visitor->trace(m_sheet);
     LinkResource::trace(visitor);
 }
 
 } // namespace blink