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, 1 insertions, 1 deletions

diff --git a/third_party/WebKit/Source/core/layout/svg/LayoutSVGGradientStop.h b/third_party/WebKit/Source/core/layout/svg/LayoutSVGGradientStop.h
index 739e1b5..51eed2e 100644
--- a/third_party/WebKit/Source/core/layout/svg/LayoutSVGGradientStop.h
+++ b/third_party/WebKit/Source/core/layout/svg/LayoutSVGGradientStop.h
@@ -42,7 +42,7 @@ public:
     // This overrides are needed to prevent ASSERTs on <svg><stop /></svg>
     // LayoutObject's default implementations ASSERT_NOT_REACHED()
     // https://bugs.webkit.org/show_bug.cgi?id=20400
-    LayoutRect clippedOverflowRectForPaintInvalidation(const LayoutBoxModelObject*, const PaintInvalidationState* = nullptr) const override { return LayoutRect(); }
+    LayoutRect localOverflowRectForPaintInvalidation() const override { return LayoutRect(); }
     FloatRect objectBoundingBox() const override { return FloatRect(); }
     FloatRect strokeBoundingBox() const override { return FloatRect(); }
     FloatRect paintInvalidationRectInLocalSVGCoordinates() const override { return FloatRect(); }