Move all components/offline_pages/ files into component/offline_pages/core

components/offline_pages/core/offline_page_item.h

Index: components/offline_pages/core/offline_page_item.h
diff --git a/components/offline_pages/offline_page_item.h b/components/offline_pages/core/offline_page_item.h
similarity index 94%
rename from components/offline_pages/offline_page_item.h
rename to components/offline_pages/core/offline_page_item.h
index 2ec13e17998f440895d1dcba8550f5a38c9b1d13..a0b698646943bc2dc330a6c1fa96cd5e5b9249db 100644
--- a/components/offline_pages/offline_page_item.h
+++ b/components/offline_pages/core/offline_page_item.h
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef COMPONENTS_OFFLINE_PAGES_OFFLINE_PAGE_ITEM_H_
-#define COMPONENTS_OFFLINE_PAGES_OFFLINE_PAGE_ITEM_H_
+#ifndef COMPONENTS_OFFLINE_PAGES_CORE_OFFLINE_PAGE_ITEM_H_
+#define COMPONENTS_OFFLINE_PAGES_CORE_OFFLINE_PAGE_ITEM_H_
 
 #include <stdint.h>
 
@@ -93,4 +93,4 @@ struct OfflinePageItem {
 
 }  // namespace offline_pages
 
-#endif  // COMPONENTS_OFFLINE_PAGES_OFFLINE_PAGE_ITEM_H_
+#endif  // COMPONENTS_OFFLINE_PAGES_CORE_OFFLINE_PAGE_ITEM_H_