Revert "Adapt and reland old position sticky implementation from https://codereview.chromium.org/34…

third_party/WebKit/Source/core/page/scrolling/StickyPositionScrollingConstraints.h

Index: third_party/WebKit/Source/core/page/scrolling/StickyPositionScrollingConstraints.h
diff --git a/third_party/WebKit/Source/core/page/scrolling/StickyPositionScrollingConstraints.h b/third_party/WebKit/Source/core/page/scrolling/StickyPositionScrollingConstraints.h
deleted file mode 100644
index e9fd95b4609d0999039fee0c855a431ecdea6b31..0000000000000000000000000000000000000000
--- a/third_party/WebKit/Source/core/page/scrolling/StickyPositionScrollingConstraints.h
+++ /dev/null
@@ -1,85 +0,0 @@
-// Copyright 2016 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef StickyPositionScrollingConstraints_h
-#define StickyPositionScrollingConstraints_h
-
-#include "platform/geometry/FloatRect.h"
-
-namespace blink {
-
-class StickyPositionScrollingConstraints final {
-public:
-    enum AnchorEdgeFlags {
-        AnchorEdgeLeft = 1 << 0,
-        AnchorEdgeRight = 1 << 1,
-        AnchorEdgeTop = 1 << 2,
-        AnchorEdgeBottom = 1 << 3
-    };
-    typedef unsigned AnchorEdges;
-
-    StickyPositionScrollingConstraints()
-        : m_anchorEdges(0)
-        , m_leftOffset(0)
-        , m_rightOffset(0)
-        , m_topOffset(0)
-        , m_bottomOffset(0)
-    { }
-
-    StickyPositionScrollingConstraints(const StickyPositionScrollingConstraints& other)
-        : m_anchorEdges(other.m_anchorEdges)
-        , m_leftOffset(other.m_leftOffset)
-        , m_rightOffset(other.m_rightOffset)
-        , m_topOffset(other.m_topOffset)
-        , m_bottomOffset(other.m_bottomOffset)
-        , m_scrollContainerRelativeContainingBlockRect(other.m_scrollContainerRelativeContainingBlockRect)
-        , m_scrollContainerRelativeStickyBoxRect(other.m_scrollContainerRelativeStickyBoxRect)
-    { }
-
-    FloatSize computeStickyOffset(const FloatRect& viewportRect) const;
-
-    AnchorEdges anchorEdges() const { return m_anchorEdges; }
-    bool hasAnchorEdge(AnchorEdgeFlags flag) const { return m_anchorEdges & flag; }
-    void addAnchorEdge(AnchorEdgeFlags edgeFlag) { m_anchorEdges |= edgeFlag; }
-    void setAnchorEdges(AnchorEdges edges) { m_anchorEdges = edges; }
-
-    float leftOffset() const { return m_leftOffset; }
-    float rightOffset() const { return m_rightOffset; }
-    float topOffset() const { return m_topOffset; }
-    float bottomOffset() const { return m_bottomOffset; }
-
-    void setLeftOffset(float offset) { m_leftOffset = offset; }
-    void setRightOffset(float offset) { m_rightOffset = offset; }
-    void setTopOffset(float offset) { m_topOffset = offset; }
-    void setBottomOffset(float offset) { m_bottomOffset = offset; }
-
-    void setScrollContainerRelativeContainingBlockRect(const FloatRect& rect) { m_scrollContainerRelativeContainingBlockRect = rect; }
-
-    void setScrollContainerRelativeStickyBoxRect(const FloatRect& rect) { m_scrollContainerRelativeStickyBoxRect = rect; }
-
-    bool operator==(const StickyPositionScrollingConstraints& other) const
-    {
-        return m_leftOffset == other.m_leftOffset
-            && m_rightOffset == other.m_rightOffset
-            && m_topOffset == other.m_topOffset
-            && m_bottomOffset == other.m_bottomOffset
-            && m_scrollContainerRelativeContainingBlockRect == other.m_scrollContainerRelativeContainingBlockRect
-            && m_scrollContainerRelativeStickyBoxRect == other.m_scrollContainerRelativeStickyBoxRect;
-    }
-
-    bool operator!=(const StickyPositionScrollingConstraints& other) const { return !(*this == other); }
-
-private:
-    AnchorEdges m_anchorEdges;
-    float m_leftOffset;
-    float m_rightOffset;
-    float m_topOffset;
-    float m_bottomOffset;
-    FloatRect m_scrollContainerRelativeContainingBlockRect;
-    FloatRect m_scrollContainerRelativeStickyBoxRect;
-};
-
-} // namespace blink
-
-#endif // StickyPositionScrollingConstraints_h