Query API: Introduces an OfflinePageModelQuery object.

components/offline_pages/offline_page_model_impl.h

Index: components/offline_pages/offline_page_model_impl.h
diff --git a/components/offline_pages/offline_page_model_impl.h b/components/offline_pages/offline_page_model_impl.h
index 85c58e6466a3b451a10ebd095bdeaf129ebc545b..67b82078c9013b4b1d797ff2450ca66a07006a2b 100644
--- a/components/offline_pages/offline_page_model_impl.h
+++ b/components/offline_pages/offline_page_model_impl.h
@@ -127,12 +127,12 @@ class OfflinePageModelImpl : public OfflinePageModel, public KeyedService {
 
   typedef ScopedVector<OfflinePageArchiver> PendingArchivers;
 
+  void ExecuteQuery(std::unique_ptr<OfflinePageModelQuery> query,
+                    const MultipleOfflinePageItemCallback& callback);
+
   // Callback for ensuring archive directory is created.
   void OnEnsureArchivesDirCreatedDone(const base::TimeTicks& start_time);
 
-  void GetAllPagesAfterLoadDone(
-      GetAllPageMode mode,
-      const MultipleOfflinePageItemCallback& callback) const;
   void CheckPagesExistOfflineAfterLoadDone(
       const std::set<GURL>& urls,
       const CheckPagesExistOfflineCallback& callback);
@@ -144,7 +144,6 @@ class OfflinePageModelImpl : public OfflinePageModel, public KeyedService {
       const SingleOfflinePageItemCallback& callback) const;
   const std::vector<int64_t> MaybeGetOfflineIdsForClientId(
       const ClientId& client_id) const;
-  const OfflinePageItem* MaybeGetPageByOfflineId(int64_t offline_id) const;
   void GetPagesByOnlineURLWhenLoadDone(
       const GURL& online_url,
       const MultipleOfflinePageItemCallback& callback) const;
@@ -221,8 +220,8 @@ class OfflinePageModelImpl : public OfflinePageModel, public KeyedService {
                                 const DeletePageCallback& callback);
 
   // Actually does the work of deleting, requires the model is loaded.
-  void DoDeletePagesByClientIds(const std::vector<ClientId>& client_ids,
-                                const DeletePageCallback& callback);
+  void DeletePages(const DeletePageCallback& callback,
+                   const MultipleOfflinePageItemResult& items);
 
   void DoGetPagesByClientIds(const std::vector<ClientId>& client_ids,
                              const MultipleOfflinePageItemCallback& callback);