Reland of Clear mojo URLLoaderClient in ResourceDispatcher on cancellation

content/child/resource_dispatcher.cc

Index: content/child/resource_dispatcher.cc
diff --git a/content/child/resource_dispatcher.cc b/content/child/resource_dispatcher.cc
index 0850e44e4564221888ca63fc37943db3f9432126..a81921a888cbf4e0a57eeb88833d79d3a3f6438b 100644
--- a/content/child/resource_dispatcher.cc
+++ b/content/child/resource_dispatcher.cc
@@ -453,6 +453,10 @@
 
   ReleaseResourcesInMessageQueue(&request_info->deferred_message_queue);
 
+  // Clear URLLoaderClient to stop receiving further Mojo IPC from the browser
+  // process.
+  it->second->url_loader_client = nullptr;
+
   // Always delete the pending_request asyncly so that cancelling the request
   // doesn't delete the request context info while its response is still being
   // handled.