Get main frame and subframe AppCache loads to work.

content/browser/appcache/appcache_url_loader_job.h

 // Copyright (c) 2017 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_URL_LOADER_JOB_H_
 #define CONTENT_BROWSER_APPCACHE_APPCACHE_URL_LOADER_JOB_H_
 
 #include "base/logging.h"
+#include "base/memory/ref_counted.h"
 #include "base/strings/string16.h"
+#include "base/time/time.h"
+#include "content/browser/appcache/appcache_entry.h"
 #include "content/browser/appcache/appcache_job.h"
+#include "content/browser/appcache/appcache_response.h"
+#include "content/browser/appcache/appcache_storage.h"
+#include "content/browser/loader/url_loader_request_handler.h"
 #include "content/common/content_export.h"
+#include "content/common/resource_request.h"
+#include "content/common/url_loader.mojom.h"
+#include "mojo/public/cpp/bindings/binding.h"
+#include "mojo/public/cpp/system/data_pipe.h"
 
 namespace content {
 
-class AppCacheHost;
 class AppCacheRequest;
-class AppCacheStorage;
+class NetToMojoPendingBuffer;
 
 // AppCacheJob wrapper for a mojom::URLLoader implementation which returns
 // responses stored in the AppCache.
-class CONTENT_EXPORT AppCacheURLLoaderJob : public AppCacheJob {
+class CONTENT_EXPORT AppCacheURLLoaderJob : public AppCacheJob,
+                                            public AppCacheStorage::Delegate,
+                                            public mojom::URLLoader {
  public:
   ~AppCacheURLLoaderJob() override;
 
+  // Sets up the bindings.
+  void Start(mojom::URLLoaderRequest request,
+             mojom::URLLoaderClientPtr client);
+
   // AppCacheJob overrides.
   void Kill() override;
   bool IsStarted() const override;
-  bool IsWaiting() const override;
-  bool IsDeliveringAppCacheResponse() const override;
-  bool IsDeliveringNetworkResponse() const override;
-  bool IsDeliveringErrorResponse() const override;
-  bool IsCacheEntryNotFound() const override;
   void DeliverAppCachedResponse(const GURL& manifest_url,
                                 int64_t cache_id,
                                 const AppCacheEntry& entry,
                                 bool is_fallback) override;
   void DeliverNetworkResponse() override;
   void DeliverErrorResponse() override;
   const GURL& GetURL() const override;
+  AppCacheURLLoaderJob* AsURLLoaderJob() override;
+
+  // mojom::URLLoader implementation:
+  void FollowRedirect() override;
+  void SetPriority(net::RequestPriority priority,
+                   int32_t intra_priority_value) override;
+
+  void set_loader_callback(LoaderCallback callback) {
+    loader_callback_ = std::move(callback);
+  }
 
  protected:
   // AppCacheJob::Create() creates this instance.
   friend class AppCacheJob;
 
-  AppCacheURLLoaderJob();
+  AppCacheURLLoaderJob(const ResourceRequest& request,
+                       AppCacheStorage* storage);
 
-  GURL url_;
+  // AppCacheStorage::Delegate methods
+  void OnResponseInfoLoaded(AppCacheResponseInfo* response_info,
+                            int64_t response_id) override;
+  void OnCacheLoaded(AppCache* cache, int64_t cache_id) override;

[michaeln, 2017/06/09 19:59:54]

the OnCacheLoaded method isn't needed in this class, its related to the
'executable' handler stuff which is not a supported feature

[ananta, 2017/06/09 20:39:33]

Thanks done.

+
+  // AppCacheResponseReader completion callback
+  void OnReadComplete(int result);
+
+  void OnConnectionError();
+
+  // Helper to send the AppCacheResponseInfo to the URLLoaderClient.
+  void SendResponseInfo();
+
+  // Helper function to read the data from the AppCache.
+  void ReadMore();
+
+  // Callback invoked when the data pipe can be written to.
+  void OnResponseBodyStreamReady(MojoResult result);
+
+  // Notifies the client about request completion.
+  void NotifyCompleted(int error_code);
+
+  // The current request.
+  ResourceRequest request_;
+
+  AppCacheStorage* storage_;
+
+  // The response details.
+  scoped_refptr<AppCacheResponseInfo> info_;
+
+  // Used to read the cache.
+  std::unique_ptr<AppCacheResponseReader> reader_;
+
+  // Time when the request started.
+  base::TimeTicks start_time_tick_;
+
+  // The AppCache manifest URL.
+  GURL manifest_url_;
+
+  // The AppCache id.
+  int64_t cache_id_;
+
+  AppCacheEntry entry_;
+
+  // Set to true if we are loading fallback content.
+  bool is_fallback_;
+
+  // The data pipe used to transfer AppCache data to the client.
+  mojo::DataPipe data_pipe_;
+
+  // Binds the URLLoaderClient with us.
+  mojo::Binding<mojom::URLLoader> binding_;
+
+  // The URLLoaderClient pointer. We call this interface with notifications
+  // about the URL load
+  mojom::URLLoaderClientPtr client_info_;
+
+  // mojo data pipe entities.
+  mojo::ScopedDataPipeProducerHandle response_body_stream_;
+
+  scoped_refptr<NetToMojoPendingBuffer> pending_write_;
+
+  mojo::SimpleWatcher writable_handle_watcher_;
+
+  // The Callback to be invoked in the network service land to indicate if
+  // the request can be serviced via the AppCache.
+  LoaderCallback loader_callback_;
 
   DISALLOW_COPY_AND_ASSIGN(AppCacheURLLoaderJob);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_APPCACHE_APPCACHE_URL_LOADER_JOB_H_