Move ClipRect and related classes from layout/ to paint/.

third_party/WebKit/Source/core/layout/ClipRectsCache.h

-// Copyright 2014 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 ClipRectsCache_h
-#define ClipRectsCache_h
-
-#include "core/layout/ClipRects.h"
-
-#if DCHECK_IS_ON()
-#include "platform/scroll/ScrollTypes.h"  // For OverlayScrollbarClipBehavior.
-#endif
-
-namespace blink {
-
-class PaintLayer;
-
-enum ClipRectsCacheSlot {
-  // Relative to the ancestor treated as the root (e.g. transformed layer).
-  // Used for hit testing.
-  RootRelativeClipRects,
-  RootRelativeClipRectsIgnoringViewportClip,
-
-  // Relative to the LayoutView's layer. Used for compositing overlap testing.
-  AbsoluteClipRects,
-
-  // Relative to painting ancestor. Used for painting.
-  PaintingClipRects,
-  PaintingClipRectsIgnoringOverflowClip,
-
-  NumberOfClipRectsCacheSlots,
-  UncachedClipRects,
-};
-
-class ClipRectsCache {
-  USING_FAST_MALLOC(ClipRectsCache);
-
- public:
-  struct Entry {
-    Entry()
-        : root(nullptr)
-#if DCHECK_IS_ON()
-          ,
-          overlayScrollbarClipBehavior(IgnoreOverlayScrollbarSize)
-#endif
-    {
-    }
-    const PaintLayer* root;
-    RefPtr<ClipRects> clipRects;
-#if DCHECK_IS_ON()
-    OverlayScrollbarClipBehavior overlayScrollbarClipBehavior;
-#endif
-  };
-  Entry& get(ClipRectsCacheSlot slot) {
-    DCHECK(slot < NumberOfClipRectsCacheSlots);
-    return m_entries[slot];
-  }
-  void clear(ClipRectsCacheSlot slot) {
-    DCHECK(slot < NumberOfClipRectsCacheSlots);
-    m_entries[slot] = Entry();
-  }
-
- private:
-  Entry m_entries[NumberOfClipRectsCacheSlots];
-};
-
-}  // namespace blink
-
-#endif  // ClipRectsCache_h