[HTML Imports] Let script of imported document running.

Source/core/html/HTMLImport.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 13 matching lines @@
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * 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/HTMLImport.h"
 
+#include "core/dom/Document.h"
 #include "core/html/HTMLImportsController.h"
 
 namespace WebCore {
 
 bool HTMLImport::haveChildrenLoaded()
 {
     if (HTMLImportsController* controller = this->controller())
         return controller->haveChildrenLoaded(this);
     return true;
 }
 
+Frame* HTMLImport::frame()
+{
+    return master()->frame();
+}
+
+Document* HTMLImport::master()
+{
+    return controller()->document();
+}
+
 } // namespace WebCore