Add null-check for context_wrapper->context() in ForeignFetchRequestHandler.

content/browser/service_worker/foreign_fetch_request_handler.cc

 // Copyright 2015 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.
 
 #include "content/browser/service_worker/foreign_fetch_request_handler.h"
 
 #include <string>
 
 #include "base/command_line.h"
 #include "base/macros.h"
@@ skipping 64 matching lines @@
     FetchCredentialsMode credentials_mode,
     FetchRedirectMode redirect_mode,
     ResourceType resource_type,
     RequestContextType request_context_type,
     RequestContextFrameType frame_type,
     scoped_refptr<ResourceRequestBodyImpl> body,
     bool initiated_in_secure_context) {
   if (!IsForeignFetchEnabled())
     return;
 
-  if (!context_wrapper)
+  if (!context_wrapper || !context_wrapper->context() ||
+      provider_id == kInvalidServiceWorkerProviderId) {
     return;
+  }
 
   if (skip_service_worker == SkipServiceWorker::ALL)
     return;
 
   if (!initiated_in_secure_context)
     return;
 
   // ServiceWorkerUtils::IsMainResource doesn't consider all worker types to
   // be main resources. This code shouldn't handle any main resource requests
   // though, so explicitly exclude the extra worker types.
@@ skipping 206 matching lines @@
   // The worker entry in the database was written by old version Chrome (< M56)
   // and the main script was not loaded yet. In this case, we can't check the
   // origin trial token.
   if (!active_version->origin_trial_tokens())
     return true;
   const auto& token_map = *active_version->origin_trial_tokens();
   return base::ContainsKey(token_map, "ForeignFetch");
 }
 
 }  // namespace content