Store previous painting clip rects on FragmentData.

third_party/WebKit/Source/core/paint/PaintLayerPainter.cpp

 // 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.
 
 #include "core/paint/PaintLayerPainter.h"
 
 #include "core/frame/LocalFrame.h"
 #include "core/layout/LayoutView.h"
 #include "core/paint/ClipPathClipper.h"
 #include "core/paint/FilterPainter.h"
@@ skipping 219 matching lines @@
   // won't cause the paint phases to become non-empty.
   if (paint_layer.NeedsRepaint())
     needs_repaint = true;
 
   // Repaint if layer's clip changes.
   if (!RuntimeEnabledFeatures::slimmingPaintInvalidationEnabled()) {
     ClipRects& clip_rects =
         paint_layer.Clipper(PaintLayer::kDoNotUseGeometryMapper)
             .PaintingClipRects(painting_info.root_layer, respect_overflow_clip,
                                subpixel_accumulation);
-    ClipRects* previous_clip_rects = paint_layer.PreviousPaintingClipRects();
+    ClipRects* previous_clip_rects = paint_layer.PreviousClipRects();
     if (&clip_rects != previous_clip_rects &&
         (!previous_clip_rects || clip_rects != *previous_clip_rects)) {
       needs_repaint = true;
       should_clear_empty_paint_phase_flags = true;
     }
-    paint_layer.SetPreviousPaintingClipRects(clip_rects);
+    paint_layer.SetPreviousClipRects(clip_rects);
   }
 
   // Repaint if previously the layer might be clipped by paintDirtyRect and
   // paintDirtyRect changes.
   if (paint_layer.PreviousPaintResult() == kMayBeClippedByPaintDirtyRect &&
       paint_layer.PreviousPaintDirtyRect() != painting_info.paint_dirty_rect) {
     needs_repaint = true;
     should_clear_empty_paint_phase_flags = true;
   }
   paint_layer.SetPreviousPaintDirtyRect(painting_info.paint_dirty_rect);
@@ skipping 999 matching lines @@
           context, layout_object, kPaintPhaseClippingMask))
     return;
 
   IntRect snapped_clip_rect = PixelSnappedIntRect(clip_rect.Rect());
   LayoutObjectDrawingRecorder drawing_recorder(
       context, layout_object, kPaintPhaseClippingMask, snapped_clip_rect);
   context.FillRect(snapped_clip_rect, Color::kBlack);
 }
 
 }  // namespace blink