Fix and refactor downloaded file handling in the loading stack

content/browser/loader/resource_dispatcher_host_impl.h

 // Copyright (c) 2012 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.
 
 // This is the browser side of the resource dispatcher, it receives requests
 // from the child process (i.e. [Renderer, Plugin, Worker]ProcessHost), and
 // dispatches them to URLRequests. It then forwards the messages from the
 // URLRequests back to the correct process for handling.
 //
 // See http://dev.chromium.org/developers/design-documents/multi-process-resource-loading
@@ skipping 31 matching lines @@
 namespace base {
 class FilePath;
 class RepeatingTimer;
 }
 
 namespace net {
 class URLRequest;
 class HttpRequestHeaders;
 }
 
-namespace storage {
-class ShareableFileReference;
-}
-
 namespace content {
 class AppCacheService;
 class AsyncRevalidationManager;
+class DownloadedTempFileImpl;
 class LoaderDelegate;
 class NavigationURLLoaderImplCore;
 class NavigationUIData;
 class RenderFrameHostImpl;
 class ResourceContext;
 class ResourceDispatcherHostDelegate;
 class ResourceLoader;
 class ResourceHandler;
 class ResourceMessageDelegate;
 class ResourceMessageFilter;
@@ skipping 137 matching lines @@
 
   // Cancels any blocked request for the specified route id.
   void CancelBlockedRequestsForRoute(
       const GlobalFrameRoutingId& global_routing_id);
 
   // Maintains a collection of temp files created in support of
   // the download_to_file capability. Used to grant access to the
   // child process and to defer deletion of the file until it's
   // no longer needed.
   void RegisterDownloadedTempFile(
-      int child_id, int request_id,
-      const base::FilePath& file_path);
+      std::unique_ptr<DownloadedTempFileImpl> downloaded_temp_file);
   void UnregisterDownloadedTempFile(int child_id, int request_id);
 
   // Needed for the sync IPC message dispatcher macros.
   bool Send(IPC::Message* message);
 
   // Indicates whether third-party sub-content can pop-up HTTP basic auth
   // dialog boxes.
   bool allow_cross_origin_auth_prompt();
 
   ResourceDispatcherHostDelegate* delegate() {
@@ skipping 451 matching lines @@
       std::unique_ptr<ResourceHandler> handler,
       bool is_content_initiated,
       bool must_download,
       bool is_new_request);
 
   LoaderMap pending_loaders_;
 
   // Collection of temp files downloaded for child processes via
   // the download_to_file mechanism. We avoid deleting them until
   // the client no longer needs them.
-  typedef std::map<int, scoped_refptr<storage::ShareableFileReference> >
+  typedef std::map<int, std::unique_ptr<DownloadedTempFileImpl>>
       DeletableFilesMap;  // key is request id
   typedef std::map<int, DeletableFilesMap>
       RegisteredTempFiles;  // key is child process id
   RegisteredTempFiles registered_temp_files_;
 
   // A timer that periodically calls UpdateLoadInfo while pending_loaders_ is
   // not empty and at least one RenderViewHost is loading.
   std::unique_ptr<base::RepeatingTimer> update_load_states_timer_;
 
   // Request ID for browser initiated requests. request_ids generated by
@@ skipping 73 matching lines @@
 
   // Points to the registered download handler intercept.
   CreateDownloadHandlerIntercept create_download_handler_intercept_;
 
   DISALLOW_COPY_AND_ASSIGN(ResourceDispatcherHostImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_LOADER_RESOURCE_DISPATCHER_HOST_IMPL_H_