Store PaintLayerFilterInfo in PaintLayerRareData instead of a HashMap.

third_party/WebKit/Source/core/paint/PaintLayer.h

 /*
  * Copyright (C) 2003, 2009, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2013 Intel Corporation. All rights reserved.
  *
  * Portions are Copyright (C) 1998 Netscape Communications Corporation.
  *
  * Other contributors:
  *   Robert O'Callahan <roc+@cs.cmu.edu>
  *   David Baron <dbaron@fas.harvard.edu>
  *   Christian Biesinger <cbiesinger@web.de>
@@ skipping 115 matching lines @@
     // It's nullptr if the layer is not composited or paints into grouped backing.
     OwnPtr<CompositedLayerMapping> compositedLayerMapping;
 
     // If the layer paints into grouped backing (i.e. squashed), this points to the
     // grouped CompositedLayerMapping. It's null if the layer is not composited or
     // paints into its own backing.
     CompositedLayerMapping* groupedMapping;
 
     OwnPtr<PaintLayerReflectionInfo> reflectionInfo;
 
+    OwnPtr<PaintLayerFilterInfo> filterInfo;
+
     // The accumulated subpixel offset of a composited layer's composited bounds compared to absolute coordinates.
     LayoutSize subpixelAccumulation;
 };
 
 // PaintLayer is an old object that handles lots of unrelated operations.
 //
 // We want it to die at some point and be replaced by more focused objects,
 // which would remove (or at least compartimentalize) a lot of complexity.
 // See the STATUS OF PAINTLAYER section below.
 //
@@ skipping 313 matching lines @@
     bool containsDirtyOverlayScrollbars() const { return m_containsDirtyOverlayScrollbars; }
     void setContainsDirtyOverlayScrollbars(bool dirtyScrollbars) { m_containsDirtyOverlayScrollbars = dirtyScrollbars; }
 
     FilterOperations computeFilterOperations(const ComputedStyle&) const;
     FilterOperations computeBackdropFilterOperations(const ComputedStyle&) const;
     bool paintsWithFilters() const;
     bool paintsWithBackdropFilters() const;
     FilterEffect* lastFilterEffect() const;
     FilterOutsets filterOutsets() const;
 
-    PaintLayerFilterInfo* filterInfo() const { return hasFilterInfo() ? PaintLayerFilterInfo::filterInfoForLayer(this) : 0; }
-    PaintLayerFilterInfo* ensureFilterInfo() { return PaintLayerFilterInfo::createFilterInfoForLayerIfNeeded(this); }
-    void removeFilterInfoIfNeeded()
-    {
-        if (hasFilterInfo())
-            PaintLayerFilterInfo::removeFilterInfoForLayer(this);
-    }
-
-    bool hasFilterInfo() const { return m_hasFilterInfo; }
-    void setHasFilterInfo(bool hasFilterInfo) { m_hasFilterInfo = hasFilterInfo; }
+    PaintLayerFilterInfo* filterInfo() const { return m_rareData ? m_rareData->filterInfo.get() : nullptr; }
+    PaintLayerFilterInfo& ensureFilterInfo();
 
     void updateFilters(const ComputedStyle* oldStyle, const ComputedStyle& newStyle);
 
     Node* enclosingNode() const;
 
     bool isInTopLayer() const;
 
     bool scrollsWithViewport() const;
     bool scrollsWithRespectTo(const PaintLayer*) const;
 
@@ skipping 300 matching lines @@
     unsigned m_needsPositionUpdate : 1;
 #endif
 
     unsigned m_3DTransformedDescendantStatusDirty : 1;
     // Set on a stacking context layer that has 3D descendants anywhere
     // in a preserves3D hierarchy. Hint to do 3D-aware hit testing.
     unsigned m_has3DTransformedDescendant : 1;
 
     unsigned m_containsDirtyOverlayScrollbars : 1;
 
-    unsigned m_hasFilterInfo : 1;
     unsigned m_needsAncestorDependentCompositingInputsUpdate : 1;
     unsigned m_needsDescendantDependentCompositingInputsUpdate : 1;
     unsigned m_childNeedsCompositingInputsUpdate : 1;
 
     // Used only while determining what layers should be composited. Applies to the tree of z-order lists.
     unsigned m_hasCompositingDescendant : 1;
 
     // Applies to the real layout layer tree (i.e., the tree determined by the layer's parent and children and
     // as opposed to the tree formed by the z-order and normal flow lists).
     unsigned m_hasNonCompositedChild : 1;
@@ skipping 56 matching lines @@
 
 } // namespace blink
 
 #ifndef NDEBUG
 // Outside the WebCore namespace for ease of invocation from gdb.
 void showLayerTree(const blink::PaintLayer*);
 void showLayerTree(const blink::LayoutObject*);
 #endif
 
 #endif // Layer_h