Schedule image resource downloads by decreasing visual impact - Blink Side

Source/core/fetch/ResourceLoadPriorityOptimizer.h

 /*
  * Copyright (C) 2013 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 29 matching lines @@
 #include "wtf/OwnPtr.h"
 
 namespace WebCore {
 
 class ResourceLoadPriorityOptimizer {
 public:
     enum VisibilityStatus {
         NotVisible,
         Visible,
     };
-    void notifyImageResourceVisibility(ImageResource*, VisibilityStatus);
+    void notifyImageResourceVisibility(ImageResource*, VisibilityStatus, const LayoutRect&);
     void updateAllImageResourcePriorities();
     void addRenderObject(RenderObject*);
     void removeRenderObject(RenderObject*);
 
     static ResourceLoadPriorityOptimizer* resourceLoadPriorityOptimizer();
 
 private:
     ResourceLoadPriorityOptimizer();
     ~ResourceLoadPriorityOptimizer();
 
     void updateImageResourcesWithLoadPriority();
 
     struct ResourceAndVisibility {
-        ResourceAndVisibility(ImageResource*, VisibilityStatus);
+        ResourceAndVisibility(ImageResource*, VisibilityStatus, uint32_t);
         ~ResourceAndVisibility();
         ResourcePtr<ImageResource> imageResource;
         VisibilityStatus status;
+        int screenArea;
     };
 
     typedef HashMap<unsigned long, OwnPtr<ResourceAndVisibility> > ImageResourceMap;
     ImageResourceMap m_imageResources;
 
     typedef HashSet<RenderObject*> RenderObjectSet;
     RenderObjectSet m_objects;
 };
 
 }
 
 #endif