diff --git content/browser/storage_partition_impl.cc content/browser/storage_partition_impl.cc
index 818a6370957a..46282b320b0b 100644
--- content/browser/storage_partition_impl.cc
+++ content/browser/storage_partition_impl.cc
@@ -577,10 +577,6 @@ class LoginHandlerDelegate {
     }
 
     WebContents* web_contents = web_contents_getter_.Run();
-    if (!web_contents) {
-      OnAuthCredentials(base::nullopt);
-      return;
-    }
 
     // WeakPtr is not strictly necessary here due to OnRequestCancelled.
     creating_login_delegate_ = true;
@@ -637,12 +633,6 @@ void OnAuthRequiredContinuation(
     web_contents_getter =
         base::BindRepeating(GetWebContents, process_id, routing_id);
   }
-  if (!web_contents_getter.Run()) {
-    mojo::Remote<network::mojom::AuthChallengeResponder>
-        auth_challenge_responder_remote(std::move(auth_challenge_responder));
-    auth_challenge_responder_remote->OnAuthCredentials(base::nullopt);
-    return;
-  }
   new LoginHandlerDelegate(std::move(auth_challenge_responder),
                            std::move(web_contents_getter), auth_info,
                            is_request_for_main_frame, process_id, routing_id,
@@ -2277,7 +2267,10 @@ void StoragePartitionImpl::GetQuotaSettings(
 void StoragePartitionImpl::InitNetworkContext() {
   network_context_ = GetContentClient()->browser()->CreateNetworkContext(
       browser_context_, is_in_memory_, relative_partition_path_);
-  DCHECK(network_context_);
+  if (!network_context_) {
+    // May happen during shutdown.
+    return;
+  }
 
   network_context_client_receiver_.reset();
   network_context_->SetClient(
diff --git services/network/public/cpp/simple_url_loader.cc services/network/public/cpp/simple_url_loader.cc
index 1cc4198e6057..0fae6dbe25a2 100644
--- services/network/public/cpp/simple_url_loader.cc
+++ services/network/public/cpp/simple_url_loader.cc
@@ -230,6 +230,7 @@ class SimpleURLLoaderImpl : public SimpleURLLoader,
   void SetRetryOptions(int max_retries, int retry_mode) override;
   void SetURLLoaderFactoryOptions(uint32_t options) override;
   void SetTimeoutDuration(base::TimeDelta timeout_duration) override;
+  void SetRequestId(int32_t request_id) override;
 
   int NetError() const override;
   const mojom::URLResponseHead* ResponseInfo() const override;
@@ -348,6 +349,8 @@ class SimpleURLLoaderImpl : public SimpleURLLoader,
   // The next values contain all the information required to restart the
   // request.
 
+  int32_t request_id_ = 0;
+
   // Populated in the constructor, and cleared once no longer needed, when no
   // more retries are possible.
   std::unique_ptr<ResourceRequest> resource_request_;
@@ -1373,6 +1376,12 @@ void SimpleURLLoaderImpl::SetTimeoutDuration(base::TimeDelta timeout_duration) {
   timeout_duration_ = timeout_duration;
 }
 
+void SimpleURLLoaderImpl::SetRequestId(int32_t request_id) {
+  // Check if a request has not yet been started.
+  DCHECK(!body_handler_);
+  request_id_ = request_id;
+}
+
 int SimpleURLLoaderImpl::NetError() const {
   // Should only be called once the request is compelete.
   DCHECK(request_state_->finished);
@@ -1521,7 +1530,7 @@ void SimpleURLLoaderImpl::StartRequest(
         string_upload_data_pipe_getter_->GetRemoteForNewUpload());
   }
   url_loader_factory->CreateLoaderAndStart(
-      mojo::MakeRequest(&url_loader_), 0 /* routing_id */, 0 /* request_id */,
+      mojo::MakeRequest(&url_loader_), 0 /* routing_id */, request_id_,
       url_loader_factory_options_, *resource_request_, std::move(client_ptr),
       net::MutableNetworkTrafficAnnotationTag(annotation_tag_));
 
diff --git services/network/public/cpp/simple_url_loader.h services/network/public/cpp/simple_url_loader.h
index 88d602b0915c..ffe9b5adcebf 100644
--- services/network/public/cpp/simple_url_loader.h
+++ services/network/public/cpp/simple_url_loader.h
@@ -332,6 +332,9 @@ class COMPONENT_EXPORT(NETWORK_CPP) SimpleURLLoader {
   // as much time as it wants.
   virtual void SetTimeoutDuration(base::TimeDelta timeout_duration) = 0;
 
+  // Set the ID that will be associated with the request.
+  virtual void SetRequestId(int32_t request_id) = 0;
+
   // Returns the net::Error representing the final status of the request. May
   // only be called once the loader has informed the caller of completion.
   virtual int NetError() const = 0;