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/callback.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/common/content_export.h"
+#include "content/common/resource_request.h"
+
+namespace net {
+class IOBuffer;
+}  // namespace net
 
 namespace content {
 
 class AppCacheHost;
 class AppCacheRequest;
 class AppCacheStorage;
 
 // 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:
+  using BufferReadCallback = base::Callback<void(void)>;
+
+  class Delegate {
+   public:
+    // Generally called when we don't have an AppCache response for the
+    // ongoing request.
+    virtual void SendNetworkResponse() {}
+
+    // Called when we want to send out an error response to the client.
+    virtual void SendErrorResponse() {}
+
+    // Called when we have a valid response from the AppCache.
+    virtual void HandleAppCacheResponseStart(
+        AppCacheResponseInfo* response_info) {}
+
+    // Called when we have valid AppCache data to send to the client.
+    virtual void HandleAppCacheData(
+        net::IOBuffer* buffer,
+        int buffer_size,
+        AppCacheURLLoaderJob::BufferReadCallback callback) {}
+
+    // Called when we have no more AppCache data to send to the client.
+    virtual void HandleAppCacheDataCompleted() {}
+  };
+
   ~AppCacheURLLoaderJob() override;
 
   // 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;
+
+  void set_delegate(Delegate* delegate) { delegate_ = delegate; }
 
  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;
+
+  // AppCacheResponseReader completion callback
+  void OnReadComplete(int result);
+
+  void OnBufferRead();
+
+  // The current request.
+  ResourceRequest request_;
+
+  // The delegate is invoked when we have data to report from the AppCache,
+  // or if the request is to be sent directly to the n/w, etc.
+  Delegate* delegate_;
+
+  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 buffer used to read AppCache data.
+  scoped_refptr<net::IOBuffer> buffer_;
 
   DISALLOW_COPY_AND_ASSIGN(AppCacheURLLoaderJob);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_APPCACHE_APPCACHE_URL_LOADER_JOB_H_