[Offline Pages] Remove load state from public OfflinePageModel API.

components/offline_pages/core/offline_page_model_impl.h

 // Copyright 2016 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_MODEL_IMPL_H_
 #define COMPONENTS_OFFLINE_PAGES_CORE_OFFLINE_PAGE_MODEL_IMPL_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 89 matching lines @@
       URLSearchMode url_search_mode,
       const MultipleOfflinePageItemCallback& callback) override;
   ClientPolicyController* GetPolicyController() override;
 
   // Methods for testing only:
   OfflinePageMetadataStore* GetStoreForTesting();
   void set_testing_clock(base::Clock* clock) { testing_clock_ = clock; }
 
   OfflinePageStorageManager* GetStorageManager();
 
-  bool is_loaded() const override;
-
   OfflineEventLogger* GetLogger() override;
 
  protected:
   // Adding a protected constructor for testing-only purposes in
   // offline_page_storage_manager_unittest.cc
   OfflinePageModelImpl();
 
  private:
   FRIEND_TEST_ALL_PREFIXES(OfflinePageModelImplTest, MarkPageForDeletion);
 
@@ skipping 165 matching lines @@
   base::Clock* testing_clock_;
 
   base::WeakPtrFactory<OfflinePageModelImpl> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(OfflinePageModelImpl);
 };
 
 }  // namespace offline_pages
 
 #endif  // COMPONENTS_OFFLINE_PAGES_CORE_OFFLINE_PAGE_MODEL_IMPL_H_