Move all fast-path paint invalidation mapping into PaintInvalidationState

- Remove the optional const PaintInvalidationState* parameter from paint
  invalidation mapping methods and move fast-path mapping code into
  PaintInvalidationState.

- PaintLayer::computePaintInvalidationRect() is now
    PaintInvalidationState::computePaintInvalidationRectInBacking();
  PaintLayer::positionFromPaintInvalidationBacking() is now
    PaintInvalidationState::positionFromPaintInvalidationBacking();
  PaintLayer::mapRectToPaintInvalidationBacking() is now
    PaintInvalidationState::mapLocalRectToPaintInvalidationBacking().

- Change LayoutObject::clippedOverflowRectForPaintInvalidationBacking() to:
  * Non-SVG objects and LayoutSVGRoot:
    LayoutObject::localOverflowRectForPaintInvalidation() which doesn't
    map the rect to paint invalidation backing;
  * SVG objects except LayoutSVGRoot:
    Using existing paintInvalidationRectInLocalSVGCoordinates()

  PaintInvalidationState::computePaintInvalidationRectInBacking(),
  calls the above functions to get the local paint invalidation rect,
  and map to paintInvalidationContainer using fast path if possible,
  or slow path by calling LayoutObject::mapToVisibleRectToAncestor().

- Let selection paint invalidation go through fast-path if possible.

BUG=591199

Review URL: https://codereview.chromium.org/1813383002

Cr-Commit-Position: refs/heads/master@{#383430}

1 files changed, 2 insertions, 1 deletions

diff --git a/third_party/WebKit/Source/core/layout/svg/LayoutSVGHiddenContainer.h b/third_party/WebKit/Source/core/layout/svg/LayoutSVGHiddenContainer.h
index 5f45a37..71dfc0b 100644
--- a/third_party/WebKit/Source/core/layout/svg/LayoutSVGHiddenContainer.h
+++ b/third_party/WebKit/Source/core/layout/svg/LayoutSVGHiddenContainer.h
@@ -41,7 +41,8 @@ protected:
 
 private:
     void paint(const PaintInfo&, const LayoutPoint&) const final;
-    LayoutRect clippedOverflowRectForPaintInvalidation(const LayoutBoxModelObject*, const PaintInvalidationState* = nullptr) const final { return LayoutRect(); }
+    LayoutRect absoluteClippedOverflowRect() const final { return LayoutRect(); }
+    FloatRect paintInvalidationRectInLocalSVGCoordinates() const final { return FloatRect(); }
     void absoluteQuads(Vector<FloatQuad>&, bool* wasFixed) const final;
 
     bool nodeAtFloatPoint(HitTestResult&, const FloatPoint& pointInParent, HitTestAction) final;