[SPInvalidation] Fix fixed-position printing

third_party/WebKit/Source/core/paint/PaintLayerPainter.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 PaintLayerPainter_h
 #define PaintLayerPainter_h
 
 #include "core/CoreExport.h"
 #include "core/paint/PaintLayerFragment.h"
 #include "core/paint/PaintLayerPaintingInfo.h"
@@ skipping 38 matching lines @@
                                  PaintLayerFlags,
                                  FragmentPolicy = AllowMultipleFragments);
 
   void paintOverlayScrollbars(GraphicsContext&,
                               const LayoutRect& damageRect,
                               const GlobalPaintFlags);
 
  private:
   enum ClipState { HasNotClipped, HasClipped };
 
-  bool collectPaintFragmentsForPaginatedFixedPosition(
+  inline bool isFixedPositionObjectInPagedMedia();
+
+  // "For paged media, boxes with fixed positions are repeated on every page."
+  // https://www.w3.org/TR/2011/REC-CSS2-20110607/visuren.html#fixed-positioning
+  // Repeats singleFragmentIgnoredPagination of the fixed-position object in
+  // each page, with paginationOffset and layerBounds adjusted for each page.
+  // TODO(wangxianzhu): Fold this into PaintLayer::collectFragments().
+  void repeatFixedPositionObjectInPages(
+      const PaintLayerFragment& singleFragmentIgnoredPagination,
       const PaintLayerPaintingInfo&,
       PaintLayerFragments&);
 
   PaintResult paintLayerContentsCompositingAllPhases(
       GraphicsContext&,
       const PaintLayerPaintingInfo&,
       PaintLayerFlags,
       FragmentPolicy = AllowMultipleFragments);
   PaintResult paintLayerWithTransform(GraphicsContext&,
                                       const PaintLayerPaintingInfo&,
@@ skipping 72 matching lines @@
   FRIEND_TEST_ALL_PREFIXES(PaintLayerPainterTest,
                            DontPaintWithTinyOpacityAndBackdropFilter);
   FRIEND_TEST_ALL_PREFIXES(PaintLayerPainterTest,
                            DoPaintWithCompositedTinyOpacity);
   FRIEND_TEST_ALL_PREFIXES(PaintLayerPainterTest, DoPaintWithNonTinyOpacity);
 };
 
 }  // namespace blink
 
 #endif  // PaintLayerPainter_h