Refactor the API for setting dynamic resource load priorities

Source/core/fetch/ResourceLoadPriorityOptimizer.h

Index: Source/core/fetch/ResourceLoadPriorityOptimizer.h
diff --git a/Source/core/fetch/ResourceLoadPriorityOptimizer.h b/Source/core/fetch/ResourceLoadPriorityOptimizer.h
deleted file mode 100644
index 17e7d8caa8622c62cc796e8a11a8148b2bd54905..0000000000000000000000000000000000000000
--- a/Source/core/fetch/ResourceLoadPriorityOptimizer.h
+++ /dev/null
@@ -1,82 +0,0 @@
-/*
- * 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
- * copyright notice, this list of conditions and the following disclaimer
- * in the documentation and/or other materials provided with the
- * distribution.
- *     * Neither the name of Google Inc. nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#ifndef ResourceLoadPriorityOptimizer_h
-#define ResourceLoadPriorityOptimizer_h
-
-#include "core/fetch/ImageResource.h"
-#include "core/fetch/ResourcePtr.h"
-#include "platform/geometry/LayoutRect.h"
-
-#include "wtf/HashMap.h"
-#include "wtf/HashSet.h"
-#include "wtf/OwnPtr.h"
-
-namespace blink {
-
-class ResourceLoadPriorityOptimizer {
-    WTF_MAKE_FAST_ALLOCATED(ResourceLoadPriorityOptimizer);
-    WTF_MAKE_NONCOPYABLE(ResourceLoadPriorityOptimizer);
-public:
-    enum VisibilityStatus {
-        NotVisible,
-        Visible,
-    };
-    void notifyImageResourceVisibility(ImageResource*, VisibilityStatus, const LayoutRect&);
-    void updateAllImageResourcePriorities();
-    void addLayoutObject(LayoutObject*);
-    void removeLayoutObject(LayoutObject*);
-
-    static ResourceLoadPriorityOptimizer* resourceLoadPriorityOptimizer();
-
-private:
-    ResourceLoadPriorityOptimizer();
-    ~ResourceLoadPriorityOptimizer();
-
-    void updateImageResourcesWithLoadPriority();
-
-    struct ResourceAndVisibility {
-        ResourceAndVisibility(ImageResource*, VisibilityStatus, uint32_t);
-        ~ResourceAndVisibility();
-        ResourcePtr<ImageResource> imageResource;
-        VisibilityStatus status;
-        int screenArea;
-    };
-
-    typedef HashMap<unsigned long, OwnPtr<ResourceAndVisibility>, WTF::IntHash<unsigned>, WTF::UnsignedWithZeroKeyHashTraits<unsigned>> ImageResourceMap;
-    ImageResourceMap m_imageResources;
-
-    typedef HashSet<LayoutObject*> LayoutObjectSet;
-    LayoutObjectSet m_objects;
-};
-
-}
-
-#endif