[SPInvalidation] Use GeometryMapper in PaintLayerClipper for paint.

third_party/WebKit/Source/core/layout/compositing/CompositingLayerAssigner.cpp

 /*
  * Copyright (C) 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2014 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 220 matching lines @@
         squashingState.mostRecentMapping->updateSquashingLayerAssignment(
             layer, squashingState.nextSquashedLayerIndex);
     if (!changedSquashingLayer)
       return;
 
     // If we've modified the collection of squashed layers, we must update
     // the graphics layer geometry.
     squashingState.mostRecentMapping->setNeedsGraphicsLayerUpdate(
         GraphicsLayerUpdateSubtree);
 
-    layer->clipper().clearClipRectsIncludingDescendants();
+    layer->clipper(PaintLayer::DoNotUseGeometryMapper)
+        .clearClipRectsIncludingDescendants();
 
     // Issue a paint invalidation, since |layer| may have been added to an
     // already-existing squashing layer.
     TRACE_LAYER_INVALIDATION(
         layer, InspectorLayerInvalidationTrackingEvent::AddedToSquashingLayer);
     layersNeedingPaintInvalidation.push_back(layer);
     m_layersChanged = true;
   } else if (compositedLayerUpdate == RemoveFromSquashingLayer) {
     if (layer->groupedMapping()) {
       // Before removing |layer| from an already-existing squashing layer that
@@ skipping 96 matching lines @@
   while (PaintLayerStackingNode* curNode = iterator.next())
     assignLayersToBackingsInternal(curNode->layer(), squashingState,
                                    layersNeedingPaintInvalidation);
 
   if (squashingState.hasMostRecentMapping &&
       &squashingState.mostRecentMapping->owningLayer() == layer)
     squashingState.haveAssignedBackingsToEntireSquashingLayerSubtree = true;
 }
 
 }  // namespace blink