Cancel the request when URLLoader is gone

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 324 matching lines @@
                        bool is_content_initiated,
                        bool do_not_prompt_for_login,
                        ResourceContext* context);
 
   bool is_shutdown() const { return is_shutdown_; }
 
   // Creates a new request ID for browser initiated requests. See the comments
   // of |request_id_| for the details. Must be called on the IO thread.
   int MakeRequestID();
 
+  // Cancels a request as requested by a renderer.
+  // Note that this cancel is subtly different from the other CancelRequest
+  // methods in this file, which also tear down the loader.

[kinuko, 2016/11/16 03:00:34]

nit: might be good to also note that this is called when mojo connection is
dropped

[yhirano, 2016/11/16 03:13:10]

Done.

+  void CancelRequestFromRenderer(GlobalRequestID request_id);
+
  private:
   friend class ResourceDispatcherHostTest;
 
   FRIEND_TEST_ALL_PREFIXES(ResourceDispatcherHostTest,
                            TestBlockedRequestsProcessDies);
   FRIEND_TEST_ALL_PREFIXES(ResourceDispatcherHostTest,
                            CalculateApproximateMemoryCost);
   FRIEND_TEST_ALL_PREFIXES(ResourceDispatcherHostTest,
                            DetachableResourceTimesOut);
   FRIEND_TEST_ALL_PREFIXES(ResourceDispatcherHostTest,
@@ skipping 412 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_