Pixel-snap the bounds in BoxPainter::boundsForDrawingRecorder

Source/core/paint/BoxPainter.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 "config.h"
 #include "core/paint/BoxPainter.h"
 
 #include "core/HTMLNames.h"
 #include "core/frame/Settings.h"
 #include "core/html/HTMLFrameOwnerElement.h"
@@ skipping 43 matching lines @@
 {
     LayoutRect bounds;
     if (RuntimeEnabledFeatures::slimmingPaintEnabled()) {
         if (m_renderBox.isDocumentElement()) {
             // The document element is specified to paint its background infinitely.
             bounds = m_renderBox.view()->backgroundRect(&m_renderBox);
         } else {
             // Use the visual overflow rect here, because it will include overflow introduced by the theme.
             bounds = m_renderBox.visualOverflowRect();
             bounds.moveBy(paintOffset);
+            bounds = pixelSnappedIntRect(bounds);
         }
     }
     return bounds;
 }
 
 void BoxPainter::paintBoxDecorationBackgroundWithRect(const PaintInfo& paintInfo, const LayoutPoint& paintOffset, const LayoutRect& paintRect)
 {
     RenderStyle* style = m_renderBox.style();
     BoxDecorationData boxDecorationData(*style, m_renderBox.canRenderBorderImage(), m_renderBox.backgroundHasOpaqueTopLayer(), m_renderBox.backgroundShouldAlwaysBeClipped(), paintInfo.context);
 
@@ skipping 2096 matching lines @@
 
     FloatPoint secondQuad[4];
     secondQuad[0] = quad[0];
     secondQuad[1] = FloatPoint(quad[0].x() - r1 * cx, quad[0].y() - r1 * cy);
     secondQuad[2] = quad[2];
     secondQuad[3] = quad[3];
     graphicsContext->clipPolygon(4, secondQuad, !secondEdgeMatches);
 }
 
 } // namespace blink