Support getting offline pages also by original URL

components/offline_pages/offline_page_model.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_MODEL_H_
 #define COMPONENTS_OFFLINE_PAGES_OFFLINE_PAGE_MODEL_H_
 
 #include <stdint.h>
 
 #include <memory>
@@ skipping 30 matching lines @@
 //
 //   // In code using the OfflinePagesModel to save a page:
 //   std::unique_ptr<ArchiverImpl> archiver(new ArchiverImpl());
 //   // Callback is of type SavePageCallback.
 //   model->SavePage(url, std::move(archiver), callback);
 //
 // TODO(fgorski): Things to describe:
 // * how to cancel requests and what to expect
 class OfflinePageModel : public base::SupportsUserData {
  public:
+  // Controls how to search on differnt URLs for pages.
+  enum class URLSearchMode {
+    // Match against the last committed URL only.
+    SEARCH_BY_FINAL_URL_ONLY,
+    // Match against all stored URLs, including the last committed URL and
+    // the original request URL.
+    SEARCH_BY_ALL_URLS
+  };
+
   // Describes the parameters to control how to save a page.
   struct SavePageParams {
     SavePageParams();
     SavePageParams(const SavePageParams& other);
 
     // The last committed URL of the page to save.
     GURL url;
 
     // The identification used by the client.
     ClientId client_id;
@@ skipping 92 matching lines @@
   // Gets all offline ids where the offline page has the matching client id.
   virtual void GetOfflineIdsForClientId(
       const ClientId& client_id,
       const MultipleOfflineIdCallback& callback) = 0;
 
   // Returns zero or one offline pages associated with a specified |offline_id|.
   virtual void GetPageByOfflineId(
       int64_t offline_id,
       const SingleOfflinePageItemCallback& callback) = 0;
 
-  // Returns the offline pages that are stored under |online_url|.
-  virtual void GetPagesByOnlineURL(
-      const GURL& online_url,
+  // Returns the offline pages that are related to |url|. |url_search_mode|
+  // controls how the url match is done. See URLSearchMode for more details.
+  virtual void GetPagesByURL(
+      const GURL& url,
+      URLSearchMode url_search_mode,
       const MultipleOfflinePageItemCallback& callback) = 0;
 
   // Marks pages with |offline_ids| as expired and deletes the associated
   // archive files.
   virtual void ExpirePages(const std::vector<int64_t>& offline_ids,
                            const base::Time& expiration_time,
                            const base::Callback<void(bool)>& callback) = 0;
 
   // Returns the policy controller.
   virtual ClientPolicyController* GetPolicyController() = 0;
 
   // TODO(dougarnett): Remove this and its uses.
   virtual bool is_loaded() const = 0;
 
   // Returns the logger. Ownership is retained by the model.
   virtual OfflineEventLogger* GetLogger() = 0;
 };
 
 }  // namespace offline_pages
 
 #endif  // COMPONENTS_OFFLINE_PAGES_OFFLINE_PAGE_MODEL_H_