First step of HTMLImports

Source/core/loader/cache/CachedResourceLoader.cpp

Index: Source/core/loader/cache/CachedResourceLoader.cpp
diff --git a/Source/core/loader/cache/CachedResourceLoader.cpp b/Source/core/loader/cache/CachedResourceLoader.cpp
index 841708aac540e126a08e4f74de335ce3a7639c52..e630d225c08c0938cdb075c1a7014025cf859a56 100644
--- a/Source/core/loader/cache/CachedResourceLoader.cpp
+++ b/Source/core/loader/cache/CachedResourceLoader.cpp
@@ -76,6 +76,8 @@ static CachedResource* createResource(CachedResource::Type type, ResourceRequest
         return new CachedCSSStyleSheet(request, charset);
     case CachedResource::Script:
         return new CachedScript(request, charset);
+    case CachedResource::HTMLDocumentResource:
+        return new CachedDocument(request, CachedResource::HTMLDocumentResource);
     case CachedResource::SVGDocumentResource:
         return new CachedDocument(request, CachedResource::SVGDocumentResource);
     case CachedResource::FontResource:
@@ -200,6 +202,11 @@ CachedResourceHandle<CachedDocument> CachedResourceLoader::requestSVGDocument(Ca
     return static_cast<CachedDocument*>(requestResource(CachedResource::SVGDocumentResource, request).get());
 }
 
+CachedResourceHandle<CachedDocument> CachedResourceLoader::requestHTMLDocument(CachedResourceRequest& request)
+{
+    return static_cast<CachedDocument*>(requestResource(CachedResource::HTMLDocumentResource, request).get());
+}
+
 CachedResourceHandle<CachedResource> CachedResourceLoader::requestLinkResource(CachedResource::Type type, CachedResourceRequest& request)
 {
     ASSERT(frame());
@@ -223,6 +230,7 @@ bool CachedResourceLoader::checkInsecureContent(CachedResource::Type type, const
     case CachedResource::Script:
     case CachedResource::XSLStyleSheet:
     case CachedResource::SVGDocumentResource:
+    case CachedResource::HTMLDocumentResource:
     case CachedResource::CSSStyleSheet:
         // These resource can inject script into the current document (Script,
         // XSL) or exfiltrate the content of the current document (CSS).
@@ -282,6 +290,7 @@ bool CachedResourceLoader::canRequest(CachedResource::Type type, const KURL& url
         // FIXME: Are we sure about CachedResource::FontResource?
         break;
     case CachedResource::SVGDocumentResource:
+    case CachedResource::HTMLDocumentResource:
     case CachedResource::XSLStyleSheet:
         if (!m_document->securityOrigin()->canRequest(url)) {
             printAccessDeniedMessage(url);
@@ -313,6 +322,10 @@ bool CachedResourceLoader::canRequest(CachedResource::Type type, const KURL& url
         if (!shouldBypassMainWorldContentSecurityPolicy && !m_document->contentSecurityPolicy()->allowStyleFromSource(url))
             return false;
         break;
+    case CachedResource::HTMLDocumentResource:
+        if (!shouldBypassMainWorldContentSecurityPolicy && !m_document->contentSecurityPolicy()->allowScriptFromSource(url))
+            return false;
+        break;
     case CachedResource::SVGDocumentResource:
     case CachedResource::ImageResource:
         if (!shouldBypassMainWorldContentSecurityPolicy && !m_document->contentSecurityPolicy()->allowImageFromSource(url))
@@ -464,6 +477,9 @@ void CachedResourceLoader::determineTargetType(ResourceRequest& request, CachedR
     case CachedResource::TextTrackResource:
         targetType = ResourceRequest::TargetIsTextTrack;
         break;
+    case CachedResource::HTMLDocumentResource:
+        targetType = ResourceRequest::TargetIsSubresource;
+        break;
     case CachedResource::SVGDocumentResource:
         targetType = ResourceRequest::TargetIsImage;
         break;