Add a stub implementation of the URLLoaderFactory for AppCache.

content/browser/url_loader_factory_getter.h

 // Copyright 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_URL_LOADER_FACTORY_GETTER_H_
 #define CONTENT_BROWSER_URL_LOADER_FACTORY_GETTER_H_
 
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "content/common/content_export.h"
 #include "content/common/url_loader_factory.mojom.h"
 #include "content/public/browser/browser_thread.h"
 
 namespace content {
 
+class ChromeAppCacheService;
+
 // Holds on to URLLoaderFactory for a given StoragePartition and allows code
 // running on the IO thread to access them. Note these are the factories used by
 // the browser process for frame requests.
 class URLLoaderFactoryGetter
     : public base::RefCountedThreadSafe<URLLoaderFactoryGetter,
                                         BrowserThread::DeleteOnIOThread> {
  public:
   URLLoaderFactoryGetter();
 
-  // Initializes this object on the UI thread.
-  void Initialize(mojom::URLLoaderFactoryPtr network_factory);
+  // Initializes this object on the UI thread. The |appcache_service|
+  // parameter is used to initialize the AppCache URLLoaderFactory. This is
+  // owned by the storage partition.
+  void Initialize(mojom::URLLoaderFactoryPtr network_factory,
+                  ChromeAppCacheService* appcache_service);
 
   // Called on the IO thread to get the URLLoaderFactory to the network service.
   // The pointer shouldn't be cached.
   mojom::URLLoaderFactoryPtr* GetNetworkFactory();
 
   // Overrides the network URLLoaderFactory for subsequent requests. Passing a
   // null pointer will restore the default behavior.
   // This is called on the UI thread.
   CONTENT_EXPORT void SetNetworkFactoryForTesting(
       mojom::URLLoaderFactoryPtr test_factory);
 
+  // Called on the IO thread to get the URLLoaderFactory for AppCache. The
+  // pointer should not be cached.
+  mojom::URLLoaderFactoryPtr* GetAppCacheFactory();
+
  private:
   friend class base::DeleteHelper<URLLoaderFactoryGetter>;
   friend struct BrowserThread::DeleteOnThread<BrowserThread::IO>;
 
   CONTENT_EXPORT ~URLLoaderFactoryGetter();
-  void InitializeOnIOThread(mojom::URLLoaderFactoryPtrInfo network_factory);
+  void InitializeOnIOThread(mojom::URLLoaderFactoryPtrInfo network_factory,
+                            ChromeAppCacheService* appcache_service);
   void SetTestNetworkFactoryOnIOThread(
       mojom::URLLoaderFactoryPtrInfo test_factory);
 
   // Only accessed on IO thread.
   mojom::URLLoaderFactoryPtr network_factory_;
   mojom::URLLoaderFactoryPtr test_factory_;
+  mojom::URLLoaderFactoryPtr appcache_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(URLLoaderFactoryGetter);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_URL_LOADER_FACTORY_GETTER_H_