Provide API in RequestCoordinator to remove results by client ID.

components/offline_pages/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_OFFLINE_PAGE_ITEM_H_
 #define COMPONENTS_OFFLINE_PAGES_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 "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,
   };
@@ skipping 43 matching lines @@
   base::Time expiration_time;
   // Number of times that the offline archive has been accessed.
   int access_count;
   // Flags about the state and behavior of the offline page.
   Flags flags;
 };
 
 }  // namespace offline_pages
 
 #endif  // COMPONENTS_OFFLINE_PAGES_OFFLINE_PAGE_ITEM_H_