Create skeleton for the Prefetching store and initial pipeline step.

components/offline_pages/core/offline_page_item.h

 // Copyright 2015 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 COMPONENTS_OFFLINE_PAGES_CORE_OFFLINE_PAGE_ITEM_H_
 #define COMPONENTS_OFFLINE_PAGES_CORE_OFFLINE_PAGE_ITEM_H_
 
 #include <stdint.h>
 
-#include <string>
-
 #include "base/files/file_path.h"
 #include "base/strings/string16.h"
 #include "base/time/time.h"
+#include "components/offline_pages/core/client_id.h"
 #include "url/gurl.h"
 
 namespace offline_pages {
 
-struct ClientId {
-  // The namespace for the id (of course 'namespace' is a reserved word, so...)
-  std::string name_space;
-  // The id in the client's namespace.  Opaque to us.
-  std::string id;
-
-  ClientId();
-  ClientId(std::string name_space, std::string id);
-
-  bool operator==(const ClientId& client_id) const;
-
-  bool operator<(const ClientId& client_id) const;
-};
-
 // Metadata of the offline page.
 struct OfflinePageItem {
  public:
   // Note that this should match with Flags enum in offline_pages.proto.
   enum Flags {
     NO_FLAG = 0,
     MARKED_FOR_DELETION = 0x1,
   };
 
   OfflinePageItem();
@@ skipping 39 matching lines @@
   // Flags about the state and behavior of the offline page.
   Flags flags;
   // The original URL of the page if not empty. Otherwise, this is set to empty
   // and |url| should be accessed instead.
   GURL original_url;
 };
 
 }  // namespace offline_pages
 
 #endif  // COMPONENTS_OFFLINE_PAGES_CORE_OFFLINE_PAGE_ITEM_H_