Bug 1016875 - Part1: Fixing leaking of mImportParent. r=mrbkap
Bug 1016875 - Part2: Ensure mDocument in ImportLoader::OnStopRequest. r=mrbkap
Bug 1016875 - Part3: Events in HTML imports should not bubble. r=mrbkap
Bug 1016875 - Part4: Removing mChannel in ImportLoader. r=mrbkap
Bug 1016875 - Part5: Redirection test for Imports. r=mrbkap
Bug 1016875 - Part6: CORS and other security checks for imports. r=mrbkap
Bug 1016875 - Part7: Imports should have their own LoadGroup. r=mrbkap
Bug 1016875 - Part8: handling imports with non-http uri. r=mrbkap
Bug 1016875 - part9: System should only import other system documents. r=mrbkap
Bug 1016875 - Part10: Principal() for ImportLoader. r=mrbkap