Add mediation for ReadingList distillation state

ios/chrome/browser/ui/reading_list/reading_list_utils.h

Index: ios/chrome/browser/ui/reading_list/reading_list_utils.h
diff --git a/ios/chrome/browser/ui/reading_list/reading_list_utils.h b/ios/chrome/browser/ui/reading_list/reading_list_utils.h
new file mode 100644
index 0000000000000000000000000000000000000000..10ba3828b25cda786336d0775a9dbd3ae13b84a7
--- /dev/null
+++ b/ios/chrome/browser/ui/reading_list/reading_list_utils.h
@@ -0,0 +1,14 @@
+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef IOS_CHROME_BROWSER_UI_READING_LIST_READING_LIST_UTILS_H_
+#define IOS_CHROME_BROWSER_UI_READING_LIST_READING_LIST_UTILS_H_
+
+#include "components/reading_list/core/reading_list_entry.h"
+#import "ios/chrome/browser/ui/reading_list/reading_list_collection_view_item.h"
+
+ReadingListUIDistillationStatus UIStatusFromModelStatus(
+    ReadingListEntry::DistillationState distillation_state);
+
+#endif  // IOS_CHROME_BROWSER_UI_READING_LIST_READING_LIST_UTILS_H_