Use GeometryMapper in PaintLayerClipper.

third_party/WebKit/Source/core/frame/FrameView.cpp

 /*
  * Copyright (C) 1998, 1999 Torben Weis <weis@kde.org>
  *                     1999 Lars Knoll <knoll@kde.org>
  *                     1999 Antti Koivisto <koivisto@kde.org>
  *                     2000 Dirk Mueller <mueller@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
  *           (C) 2006 Graham Dennis (graham.dennis@gmail.com)
  *           (C) 2006 Alexey Proskuryakov (ap@nypop.com)
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
@@ skipping 2793 matching lines @@
 
 void FrameView::updateWidgetGeometriesIfNeeded() {
   if (!m_needsUpdateWidgetGeometries)
     return;
 
   m_needsUpdateWidgetGeometries = false;
 
   updateWidgetGeometries();
 }
 
+GeometryMapper* FrameView::geometryMapper() {
+  return frame().localFrameRoot()->view()->m_geometryMapper.get();
+}
+
 void FrameView::updateAllLifecyclePhases() {
   frame().localFrameRoot()->view()->updateLifecyclePhasesInternal(
       DocumentLifecycle::PaintClean);
 }
 
 // TODO(chrishtr): add a scrolling update lifecycle phase.
 void FrameView::updateLifecycleToCompositingCleanPlusScrolling() {
   if (RuntimeEnabledFeatures::slimmingPaintV2Enabled()) {
     updateAllLifecyclePhasesExceptPaint();
   } else {
@@ skipping 2251 matching lines @@
     std::unique_ptr<CompositorAnimationTimeline> timeline) {
   m_animationTimeline = std::move(timeline);
 }
 
 void FrameView::setAnimationHost(
     std::unique_ptr<CompositorAnimationHost> host) {
   m_animationHost = std::move(host);
 }
 
 }  // namespace blink