[HTML Imports] Implement "load" and "error" events.

Source/core/html/HTMLImportsController.cpp

 /*
  * Copyright (C) 2013 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 15 matching lines @@
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "config.h"
 #include "core/html/HTMLImportsController.h"
 
 #include "core/dom/Document.h"
 #include "core/html/HTMLImportLoader.h"
+#include "core/html/HTMLImportLoaderClient.h"
+#include "core/loader/cache/ResourceFetcher.h"
 
 namespace WebCore {
 
 void HTMLImportsController::provideTo(Document* master)
 {
     DEFINE_STATIC_LOCAL(const char*, name, ("HTMLImportsController"));
     OwnPtr<HTMLImportsController> controller = adoptPtr(new HTMLImportsController(master));
     master->setImport(controller.get());
     Supplement<ScriptExecutionContext>::provideTo(master, name, controller.release());
 }
@@ skipping 11 matching lines @@
 
 void HTMLImportsController::clear()
 {
     for (size_t i = 0; i < m_imports.size(); ++i)
         m_imports[i]->importDestroyed();
     if (m_master)
         m_master->setImport(0);
     m_master = 0;
 }
 
-PassRefPtr<HTMLImportLoader> HTMLImportsController::createLoader(HTMLImport* parent, const KURL& url, const ResourcePtr<CachedRawResource>& resource)
+PassRefPtr<HTMLImportLoader> HTMLImportsController::createLoader(HTMLImport* parent, FetchRequest request)
 {
-    ASSERT(!url.isEmpty() && url.isValid());
-    RefPtr<HTMLImportLoader> loader = adoptRef(new HTMLImportLoader(parent, url, resource));
+    ASSERT(!request.url().isEmpty() && request.url().isValid());
+
+    if (RefPtr<HTMLImportLoader> found = findLinkFor(request.url()))
+        return found.release();
+
+    request.setPotentiallyCrossOriginEnabled(securityOrigin(), DoNotAllowStoredCredentials);
+    ResourcePtr<CachedRawResource> resource = parent->document()->fetcher()->requestImport(request);
+    if (!resource)
+        return 0;
+
+    RefPtr<HTMLImportLoader> loader = adoptRef(new HTMLImportLoader(parent, request.url(), resource));
     parent->appendChild(loader.get());
     m_imports.append(loader);
     return loader.release();
 }
 
 void HTMLImportsController::showSecurityErrorMessage(const String& message)
 {
     m_master->addConsoleMessage(JSMessageSource, ErrorMessageLevel, message);
 }
 
@@ skipping 60 matching lines @@
 
 void HTMLImportsController::unblockTimerFired(Timer<HTMLImportsController>*)
 {
     do {
         m_unblockTimer.stop();
         HTMLImport::unblock(this);
     } while (m_unblockTimer.isActive());
 }
 
 } // namespace WebCore