PlzNavigate: AppCache support.

content/browser/appcache/appcache_host.h

 // Copyright (c) 2011 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 CONTENT_BROWSER_APPCACHE_APPCACHE_HOST_H_
 #define CONTENT_BROWSER_APPCACHE_APPCACHE_HOST_H_
 
 #include <stdint.h>
 
 #include "base/callback.h"
@@ skipping 145 matching lines @@
   // work properly, this method needs to by invoked prior to cache selection.
   void NotifyMainResourceBlocked(const GURL& manifest_url);
 
   // Used by the update job to keep track of which hosts are associated
   // with which pending master entries.
   const GURL& pending_master_entry_url() const {
     return new_master_entry_url_;
   }
 
   int host_id() const { return host_id_; }
+
   AppCacheServiceImpl* service() const { return service_; }
   AppCacheStorage* storage() const { return storage_; }
   AppCacheFrontend* frontend() const { return frontend_; }
+
+  // PlzNavigate:
+  // The AppCacheHost instance is created with a dummy AppCacheFrontend
+  // pointer when the navigation starts. We need to switch it to the
+  // actual frontend when the navigation commits.
+  void set_frontend(AppCacheFrontend* frontend) { frontend_ = frontend; }
+
   AppCache* associated_cache() const { return associated_cache_.get(); }
 
   void enable_cache_selection(bool enable) {
     is_cache_selection_enabled_ = enable;
   }
 
   bool is_selection_pending() const {
     return pending_selected_cache_id_ != kAppCacheNoCacheId ||
            !pending_selected_manifest_url_.is_empty();
   }
@@ skipping 162 matching lines @@
   FRIEND_TEST_ALL_PREFIXES(content::AppCacheHostTest, SelectCacheBlocked);
   FRIEND_TEST_ALL_PREFIXES(content::AppCacheHostTest, SelectCacheTwice);
   FRIEND_TEST_ALL_PREFIXES(content::AppCacheTest, CleanupUnusedCache);
 
   DISALLOW_COPY_AND_ASSIGN(AppCacheHost);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_APPCACHE_APPCACHE_HOST_H_