fix: crash in webRequest due to unsafe static_cast

upstream was changed to wrap the network delegate

see https://chromium.googlesource.com/chromium/src/+/69.0.3497.106/services/network/network_context.cc#948

atom/browser/api/atom_api_web_request.cc

@@ -49,11 +49,9 @@ void CallNetworkDelegateMethod(
     URLPatterns patterns,
     Listener listener) {
   // Force creating network delegate.
-  net::URLRequestContext* context =
-      url_request_context_getter->GetURLRequestContext();
+  url_request_context_getter->GetURLRequestContext();
   // Then call the method.
-  AtomNetworkDelegate* network_delegate =
-      static_cast<AtomNetworkDelegate*>(context->network_delegate());
+  auto* network_delegate = url_request_context_getter->network_delegate();
   (network_delegate->*method)(type, std::move(patterns), std::move(listener));
 }
 

atom/browser/net/url_request_context_getter.cc

@@ -313,7 +313,9 @@ net::URLRequestContext* URLRequestContextGetter::GetURLRequestContext() {
   if (!url_request_context_) {
     std::unique_ptr<network::URLRequestContextBuilderMojo> builder =
         std::make_unique<network::URLRequestContextBuilderMojo>();
-    builder->set_network_delegate(std::make_unique<AtomNetworkDelegate>());
+    auto network_delegate = std::make_unique<AtomNetworkDelegate>();
+    network_delegate_ = network_delegate.get();
+    builder->set_network_delegate(std::move(network_delegate));
 
     ct_delegate_.reset(new brightray::RequireCTDelegate);
     auto cert_verifier = std::make_unique<AtomCertVerifier>(ct_delegate_.get());

atom/browser/net/url_request_context_getter.h

@@ -26,6 +26,7 @@ class RequireCTDelegate;
 namespace atom {
 
 class AtomBrowserContext;
+class AtomNetworkDelegate;
 class AtomURLRequestJobFactory;
 class ResourceContext;
 
@@ -44,6 +45,8 @@ class URLRequestContextGetter : public net::URLRequestContextGetter {
     return top_job_factory_.get();
   }
 
+  AtomNetworkDelegate* network_delegate() const { return network_delegate_; }
+
  private:
   friend class AtomBrowserContext;
 
@@ -99,6 +102,7 @@ class URLRequestContextGetter : public net::URLRequestContextGetter {
 
   URLRequestContextGetter::Handle* context_handle_;
   net::URLRequestContext* url_request_context_;
+  AtomNetworkDelegate* network_delegate_;
   content::ProtocolHandlerMap protocol_handlers_;
   content::URLRequestInterceptorScopedVector protocol_interceptors_;
   bool context_shutting_down_;