Change PaintLayer::m_layoutObject to a reference.

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

 // Copyright 2016 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/BoxReflectionUtils.h"
 
 #include "core/layout/LayoutBox.h"
 #include "core/paint/NinePieceImagePainter.h"
 #include "core/paint/PaintLayer.h"
 #include "platform/LengthFunctions.h"
 #include "platform/geometry/FloatRect.h"
 #include "platform/geometry/LayoutPoint.h"
 #include "platform/geometry/LayoutRect.h"
 #include "platform/graphics/BoxReflection.h"
 #include "platform/graphics/paint/DrawingRecorder.h"
 #include "platform/graphics/paint/PaintRecordBuilder.h"
 
 namespace blink {
 
 BoxReflection boxReflectionForPaintLayer(const PaintLayer& layer,
                                          const ComputedStyle& style) {
   const StyleReflection* reflectStyle = style.boxReflect();
 
-  LayoutRect frameLayoutRect = toLayoutBox(layer.layoutObject())->frameRect();
+  LayoutRect frameLayoutRect = toLayoutBox(layer.layoutObject()).frameRect();
   FloatRect frameRect(frameLayoutRect);
   BoxReflection::ReflectionDirection direction =
       BoxReflection::VerticalReflection;
   float offset = 0;
   switch (reflectStyle->direction()) {
     case ReflectionAbove:
       direction = BoxReflection::VerticalReflection;
       offset = -floatValueForLength(reflectStyle->offset(), frameRect.height());
       break;
     case ReflectionBelow:
@@ skipping 19 matching lines @@
     LayoutRect maskBoundingRect(maskRect);
     maskBoundingRect.expand(style.imageOutsets(maskNinePiece));
     FloatRect maskBoundingFloatRect(maskBoundingRect);
 
     // TODO(jbroman): PaintRecordBuilder + DrawingRecorder seems excessive.
     // If NinePieceImagePainter operated on SkCanvas, we'd only need a
     // PictureRecorder here.
     PaintRecordBuilder builder(maskBoundingFloatRect);
     {
       GraphicsContext& context = builder.context();
-      DrawingRecorder drawingRecorder(context, *layer.layoutObject(),
+      DrawingRecorder drawingRecorder(context, layer.layoutObject(),
                                       DisplayItem::kReflectionMask,
                                       maskBoundingFloatRect);
-      NinePieceImagePainter(*layer.layoutObject())
+      NinePieceImagePainter(layer.layoutObject())
           .paint(builder.context(), maskRect, style, maskNinePiece,
                  SkBlendMode::kSrcOver);
     }
     mask = builder.endRecording();
   }
 
   return BoxReflection(direction, offset, std::move(mask));
 }
 
 }  // namespace blink