Keep track of how many documents had a resource intercepted by foreign fetch.

third_party/WebKit/public/platform/WebURLResponse.h

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 213 matching lines @@
     BLINK_PLATFORM_EXPORT void setWasAlternateProtocolAvailable(bool);
 
     // Flag whether this request was loaded via an explicit proxy (HTTP, SOCKS, etc).
     BLINK_PLATFORM_EXPORT bool wasFetchedViaProxy() const;
     BLINK_PLATFORM_EXPORT void setWasFetchedViaProxy(bool);
 
     // Flag whether this request was loaded via a ServiceWorker.
     BLINK_PLATFORM_EXPORT bool wasFetchedViaServiceWorker() const;
     BLINK_PLATFORM_EXPORT void setWasFetchedViaServiceWorker(bool);
 
+    // Flag whether this request was loaded using a foreign fetch service worker.
+    BLINK_PLATFORM_EXPORT bool wasFetchedViaForeignFetch() const;
+    BLINK_PLATFORM_EXPORT void setWasFetchedViaForeignFetch(bool);
+
     // Flag whether the fallback request with skip service worker flag was
     // required.
     BLINK_PLATFORM_EXPORT bool wasFallbackRequiredByServiceWorker() const;
     BLINK_PLATFORM_EXPORT void setWasFallbackRequiredByServiceWorker(bool);
 
     // The type of the response which was fetched by the ServiceWorker.
     BLINK_PLATFORM_EXPORT WebServiceWorkerResponseType serviceWorkerResponseType() const;
     BLINK_PLATFORM_EXPORT void setServiceWorkerResponseType(WebServiceWorkerResponseType);
 
     // The original URL of the response which was fetched by the ServiceWorker.
@@ skipping 60 matching lines @@
     // instance it contains.
     std::unique_ptr<ResourceResponseContainer> m_ownedResourceResponse;
 
     // Should never be null.
     ResourceResponse* m_resourceResponse;
 };
 
 } // namespace blink
 
 #endif