Revert of Improve performance of GeometryMapper cache.

third_party/WebKit/Source/platform/graphics/paint/GeometryMapperClipCache.h

Index: third_party/WebKit/Source/platform/graphics/paint/GeometryMapperClipCache.h
diff --git a/third_party/WebKit/Source/platform/graphics/paint/GeometryMapperClipCache.h b/third_party/WebKit/Source/platform/graphics/paint/GeometryMapperClipCache.h
deleted file mode 100644
index 6b6fc74f79f95c2380d0b5246184f32c291bcef1..0000000000000000000000000000000000000000
--- a/third_party/WebKit/Source/platform/graphics/paint/GeometryMapperClipCache.h
+++ /dev/null
@@ -1,68 +0,0 @@
-// Copyright 2017 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 GeometryMapperClipCache_h
-#define GeometryMapperClipCache_h
-
-#include "platform/PlatformExport.h"
-#include "platform/graphics/paint/FloatClipRect.h"
-#include "wtf/Vector.h"
-
-namespace blink {
-
-class ClipPaintPropertyNode;
-class FloatClipRect;
-class TransformPaintPropertyNode;
-
-// A GeometryMapperClipCache hangs off a ClipPaintPropertyNode. It stores
-// cached "clip visual rects" (See GeometryMapper.h) from that node in
-// ancestor spaces.
-class PLATFORM_EXPORT GeometryMapperClipCache {
- public:
-  GeometryMapperClipCache(){};
-
-  struct ClipAndTransform {
-    const ClipPaintPropertyNode* ancestorClip;
-    const TransformPaintPropertyNode* ancestorTransform;
-    bool operator==(const ClipAndTransform& other) const {
-      return ancestorClip == other.ancestorClip &&
-             ancestorTransform == other.ancestorTransform;
-    }
-    ClipAndTransform(const ClipPaintPropertyNode* ancestorClipArg,
-                     const TransformPaintPropertyNode* ancestorTransformArg)
-        : ancestorClip(ancestorClipArg),
-          ancestorTransform(ancestorTransformArg) {}
-  };
-
-  // Returns the clip visual rect  of the owning
-  // clip of |this| in the space of |ancestors|, if there is one cached.
-  // Otherwise returns null.
-  const FloatClipRect* getCachedClip(const ClipAndTransform& ancestors);
-  // Stores the "clip visual rect" of |this in the space of |ancestors|,
-  // into a local cache.
-
-  void setCachedClip(const ClipAndTransform&, const FloatClipRect&);
-
-  static void clearCache();
-
- private:
-  struct ClipCacheEntry {
-    const ClipAndTransform clipAndTransform;
-    const FloatClipRect clipRect;
-    ClipCacheEntry(const ClipAndTransform& clipAndTransformArg,
-                   const FloatClipRect& clipRectArg)
-        : clipAndTransform(clipAndTransformArg), clipRect(clipRectArg) {}
-  };
-
-  void invalidateCacheIfNeeded();
-
-  Vector<ClipCacheEntry> m_clipCache;
-  unsigned m_cacheGeneration;
-
-  DISALLOW_COPY_AND_ASSIGN(GeometryMapperClipCache);
-};
-
-}  // namespace blink
-
-#endif  // GeometryMapperClipCache_h