Collapse images disallowed by the Safe Browsing Subresource Filter.

third_party/WebKit/Source/core/fetch/ImageResource.cpp

 /*
     Copyright (C) 1998 Lars Knoll (knoll@mpi-hd.mpg.de)
     Copyright (C) 2001 Dirk Mueller (mueller@kde.org)
     Copyright (C) 2002 Waldo Bastian (bastian@kde.org)
     Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com)
     Copyright (C) 2004, 2005, 2006, 2007 Apple Inc. All rights reserved.
 
     This library is free software; you can redistribute it and/or
     modify it under the terms of the GNU Library General Public
     License as published by the Free Software Foundation; either
@@ skipping 65 matching lines @@
 
 ImageResource* ImageResource::fetch(FetchRequest& request,
                                     ResourceFetcher* fetcher) {
   if (request.resourceRequest().requestContext() ==
       WebURLRequest::RequestContextUnspecified) {
     request.mutableResourceRequest().setRequestContext(
         WebURLRequest::RequestContextImage);
   }
   if (fetcher->context().pageDismissalEventBeingDispatched()) {
     KURL requestURL = request.resourceRequest().url();
-    if (requestURL.isValid() &&
-        fetcher->context().canRequest(Resource::Image,
-                                      request.resourceRequest(), requestURL,
-                                      request.options(), request.forPreload(),
-                                      request.getOriginRestriction()))
-      fetcher->context().sendImagePing(requestURL);
+    if (requestURL.isValid()) {
+      ResourceRequestBlockedReason blockReason = fetcher->context().canRequest(
+          Resource::Image, request.resourceRequest(), requestURL,
+          request.options(), request.forPreload(),
+          request.getOriginRestriction());
+      if (blockReason == ResourceRequestBlockedReason::None)
+        fetcher->context().sendImagePing(requestURL);
+    }
     return nullptr;
   }
 
   ImageResource* resource = toImageResource(
       fetcher->requestResource(request, ImageResourceFactory(request)));
   if (resource &&
       request.placeholderImageRequestType() != FetchRequest::AllowPlaceholder &&
       resource->m_isPlaceholder) {
     // If the image is a placeholder, but this fetch doesn't allow a
     // placeholder, then load the original image. Note that the cache is not
@@ skipping 611 matching lines @@
            WebServiceWorkerResponseTypeOpaque;
   }
   if (!getImage()->currentFrameHasSingleSecurityOrigin())
     return false;
   if (passesAccessControlCheck(securityOrigin))
     return true;
   return !securityOrigin->taintsCanvas(response().url());
 }
 
 }  // namespace blink