HTMLImport preload support

third_party/WebKit/Source/core/loader/LinkLoader.cpp

 /*
  * Copyright (C) 2011 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 179 matching lines @@
   } else if (as == "script") {
     type = Resource::Script;
   } else if (as == "style") {
     type = Resource::CSSStyleSheet;
   } else if (as == "media") {
     type = Resource::Media;
   } else if (as == "font") {
     type = Resource::Font;
   } else if (as == "track") {
     type = Resource::TextTrack;
+  } else if (as == "import") {
+    // This is a non-specced, proprietary value and we should not ship this
+    // without previous discussion!!!!
+    type = Resource::ImportResource;
   } else {
     type = Resource::Raw;
     if (!as.isEmpty())
       return false;
   }
   return true;
 }
 
 void LinkLoader::createLinkPreloadResourceClient(Resource* resource) {
   if (!resource)
     return;
   switch (resource->getType()) {
     case Resource::Image:
       m_linkPreloadResourceClient = LinkPreloadImageResourceClient::create(
           this, toImageResource(resource));
       break;
     case Resource::Script:
       m_linkPreloadResourceClient = LinkPreloadScriptResourceClient::create(
           this, toScriptResource(resource));
       break;
     case Resource::CSSStyleSheet:
       m_linkPreloadResourceClient = LinkPreloadStyleResourceClient::create(
           this, toCSSStyleSheetResource(resource));
       break;
     case Resource::Font:
       m_linkPreloadResourceClient =
           LinkPreloadFontResourceClient::create(this, toFontResource(resource));
       break;
+    case Resource::ImportResource:
     case Resource::Media:
     case Resource::TextTrack:
     case Resource::Raw:
       m_linkPreloadResourceClient =
           LinkPreloadRawResourceClient::create(this, toRawResource(resource));
       break;
     default:
       NOTREACHED();
   }
 }
 
 static bool isSupportedType(Resource::Type resourceType,
                             const String& mimeType) {
   if (mimeType.isEmpty())
     return true;
   switch (resourceType) {
     case Resource::Image:
       return MIMETypeRegistry::isSupportedImagePrefixedMIMEType(mimeType);
     case Resource::Script:
       return MIMETypeRegistry::isSupportedJavaScriptMIMEType(mimeType);
     case Resource::CSSStyleSheet:
       return MIMETypeRegistry::isSupportedStyleSheetMIMEType(mimeType);
     case Resource::Font:
       return MIMETypeRegistry::isSupportedFontMIMEType(mimeType);
     case Resource::Media:
       return MIMETypeRegistry::isSupportedMediaMIMEType(mimeType, String());
     case Resource::TextTrack:
       return MIMETypeRegistry::isSupportedTextTrackMIMEType(mimeType);
+    case Resource::ImportResource:
     case Resource::Raw:
       return true;
     default:
       NOTREACHED();
   }
   return false;
 }
 
 static Resource* preloadIfNeeded(const LinkRelAttribute& relAttribute,
                                  const KURL& href,
@@ skipping 211 matching lines @@
 
 DEFINE_TRACE(LinkLoader) {
   visitor->trace(m_client);
   visitor->trace(m_prerender);
   visitor->trace(m_linkPreloadResourceClient);
   ResourceOwner<Resource, ResourceClient>::trace(visitor);
   PrerenderClient::trace(visitor);
 }
 
 }  // namespace blink