Add support for fallback content for the frame. This includes main and subframes.

content/browser/appcache/appcache_request_handler.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_REQUEST_HANDLER_H_
 #define CONTENT_BROWSER_APPCACHE_APPCACHE_REQUEST_HANDLER_H_
 
 #include <stdint.h>
 
 #include <memory>
@@ skipping 147 matching lines @@
   void ContinueMaybeLoadSubResource();
 
   // AppCacheHost::Observer override
   void OnCacheSelectionComplete(AppCacheHost* host) override;
 
   // URLLoaderRequestHandler override
   void MaybeCreateLoader(const ResourceRequest& resource_request,
                          ResourceContext* resource_context,
                          LoaderCallback callback) override;
   mojom::URLLoaderFactoryPtr MaybeCreateSubresourceFactory() override;
+  bool MaybeGetFallbackForResponse(const ResourceResponseHead& response,
+                                   mojom::URLLoaderClientPtr* client,
+                                   mojom::URLLoaderRequest* request) override;
+  bool MaybeGetFallbackForRedirect(const ResourceResponseHead& response,
+                                   const net::RedirectInfo& redirect_info,
+                                   mojom::URLLoaderClientPtr* client,
+                                   mojom::URLLoaderRequest* request) override;
 
   // Data members -----------------------------------------------
 
   // What host we're servicing a request for.
   AppCacheHost* host_;
 
   // Frame vs subresource vs sharedworker loads are somewhat different.
   ResourceType resource_type_;
 
   // True if corresponding AppCache group should be resetted before load.
@@ skipping 69 matching lines @@
   // The AppCache host instance. We pass this to the
   // AppCacheSubresourceURLFactory instance on creation.
   base::WeakPtr<AppCacheHost> appcache_host_;
 
   DISALLOW_COPY_AND_ASSIGN(AppCacheRequestHandler);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_APPCACHE_APPCACHE_REQUEST_HANDLER_H_