PlzNavigate: Add first version of NavigationURLLoader.

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 36 matching lines @@
 
 namespace net {
 class URLRequestJobFactory;
 }
 
 namespace storage {
 class ShareableFileReference;
 }
 
 namespace content {
+class AppCacheService;
+class NavigationURLLoaderCore;
 class ResourceContext;
 class ResourceDispatcherHostDelegate;
 class ResourceMessageDelegate;
 class ResourceMessageFilter;
 class ResourceRequestInfoImpl;
 class SaveFileManager;
 class WebContentsImpl;
 struct CommonNavigationParams;
 struct DownloadSaveInfo;
 struct NavigationRequestInfo;
@@ skipping 182 matching lines @@
   // sending it to the renderer. Returns true if there are enough file
   // descriptors available for the shared memory buffer. If false is returned,
   // the request should cancel.
   bool HasSufficientResourcesForRequest(const net::URLRequest* request_);
 
   // Called by a ResourceHandler after it has finished its request and is done
   // using its shared memory buffer. Frees up that file descriptor to be used
   // elsewhere.
   void FinishedWithResourcesForRequest(const net::URLRequest* request_);
 
-  // PlzNavigate
-  // Called by NavigationRequest to start a navigation request in the node
-  // identified by |frame_node_id|.
-  void StartNavigationRequest(const CommonNavigationParams& common_params,
+  // PlzNavigate: Begins a request for NavigationURLLoader. |loader| is the
+  // loader to attach to the leaf resource handler.
+  void BeginNavigationRequest(ResourceContext* resource_context,
+                              int64 frame_tree_node_id,
+                              const CommonNavigationParams& common_params,
                               const NavigationRequestInfo& info,
                               scoped_refptr<ResourceRequestBody> request_body,
-                              int64 navigation_request_id,
-                              int64 frame_node_id);
-
-  // PlzNavigate
-  // Called by NavigationRequest to cancel a navigation request with the
-  // provided |navigation_request_id| in the node identified by
-  // |frame_node_id|.
-  void CancelNavigationRequest(int64 navigation_request_id,
-                               int64 frame_node_id);
+                              NavigationURLLoaderCore* loader);
 
  private:
   friend class ResourceDispatcherHostTest;
 
   FRIEND_TEST_ALL_PREFIXES(ResourceDispatcherHostTest,
                            TestBlockedRequestsProcessDies);
   FRIEND_TEST_ALL_PREFIXES(ResourceDispatcherHostTest,
                            CalculateApproximateMemoryCost);
   FRIEND_TEST_ALL_PREFIXES(ResourceDispatcherHostTest,
                            DetachableResourceTimesOut);
@@ skipping 120 matching lines @@
   // loading.
   scoped_ptr<ResourceHandler> CreateResourceHandler(
       net::URLRequest* request,
       const ResourceHostMsg_Request& request_data,
       IPC::Message* sync_result,
       int route_id,
       int process_type,
       int child_id,
       ResourceContext* resource_context);
 
+  // Wraps |handler| in the standard resource handlers for normal resource
+  // loading and navigation requests.

[clamy, 2014/10/16 13:43:51]

nit: Maybe precise which kind of ResourceHandlers can be added by this function?

[davidben, 2014/10/22 01:32:37]

Done.

+  scoped_ptr<ResourceHandler> AddStandardHandlers(
+      net::URLRequest* request,
+      ResourceType resource_type,
+      ResourceContext* resource_context,
+      AppCacheService* appcache_service,
+      int child_id,
+      int route_id,
+      scoped_ptr<ResourceHandler> handler);
+
   void OnDataDownloadedACK(int request_id);
   void OnUploadProgressACK(int request_id);
   void OnCancelRequest(int request_id);
   void OnReleaseDownloadedFile(int request_id);
 
   // Creates ResourceRequestInfoImpl for a download or page save.
   // |download| should be true if the request is a file download.
   ResourceRequestInfoImpl* CreateRequestInfo(
       int child_id,
       int route_id,
@@ skipping 120 matching lines @@
   DelegateMap delegate_map_;
 
   scoped_ptr<ResourceScheduler> scheduler_;
 
   DISALLOW_COPY_AND_ASSIGN(ResourceDispatcherHostImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_LOADER_RESOURCE_DISPATCHER_HOST_IMPL_H_