Change Lo-Fi bool to bitmask to support multiple Previews types

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 603 matching lines @@
       break;
   }
 
   if (m_image->animationPolicy() != newPolicy) {
     m_image->resetAnimation();
     m_image->setAnimationPolicy(newPolicy);
   }
 }
 
 static bool isLoFiImage(const ImageResource& resource) {
-  if (resource.resourceRequest().loFiState() != WebURLRequest::LoFiOn)
+  if (!(resource.resourceRequest().previewsState() &
+        WebURLRequest::PreviewsState::ServerLoFiOn)) {
     return false;
+  }
   return !resource.isLoaded() ||
          resource.response()
              .httpHeaderField("chrome-proxy-content-transform")
              .contains("empty-image");
 }
 
 void ImageResource::reloadIfLoFiOrPlaceholder(
     ResourceFetcher* fetcher,
     ReloadCachePolicy reloadCachePolicy) {
   if (!m_isPlaceholder && !isLoFiImage(*this))
@@ skipping 77 matching lines @@
            WebServiceWorkerResponseTypeOpaque;
   }
   if (!getImage()->currentFrameHasSingleSecurityOrigin())
     return false;
   if (passesAccessControlCheck(securityOrigin))
     return true;
   return !securityOrigin->taintsCanvas(response().url());
 }
 
 }  // namespace blink