Use GeometryMapper in PaintInvalidator

third_party/WebKit/Source/core/paint/SVGRootPainter.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/SVGRootPainter.h"
 
 #include "core/layout/svg/LayoutSVGRoot.h"
 #include "core/layout/svg/SVGLayoutSupport.h"
 #include "core/paint/BoxPainter.h"
 #include "core/paint/ObjectPaintProperties.h"
@@ skipping 10 matching lines @@
 IntRect SVGRootPainter::pixelSnappedSize(const LayoutPoint& paintOffset) const
 {
     return pixelSnappedIntRect(paintOffset, m_layoutSVGRoot.size());
 }
 
 AffineTransform SVGRootPainter::transformToPixelSnappedBorderBox(const LayoutPoint& paintOffset) const
 {
     const IntRect snappedSize = pixelSnappedSize(paintOffset);
     AffineTransform paintOffsetToBorderBox =
         AffineTransform::translation(snappedSize.x(), snappedSize.y());
-    paintOffsetToBorderBox.scale(
-        snappedSize.width() / m_layoutSVGRoot.size().width().toFloat(),
-        snappedSize.height() / m_layoutSVGRoot.size().height().toFloat());
+    LayoutSize size = m_layoutSVGRoot.size();
+    if (!size.isEmpty()) {
+        paintOffsetToBorderBox.scale(
+            snappedSize.width() / size.width().toFloat(),
+            snappedSize.height() / size.height().toFloat());
+    }
     paintOffsetToBorderBox.multiply(m_layoutSVGRoot.localToBorderBoxTransform());
     return paintOffsetToBorderBox;
 }
 
 void SVGRootPainter::paint(const PaintInfo& paintInfo, const LayoutPoint& paintOffset)
 {
     // An empty viewport disables rendering.
     if (pixelSnappedSize(paintOffset).isEmpty())
         return;
 
@@ skipping 25 matching lines @@
     if (paintContext.paintInfo().phase == PaintPhaseForeground && !paintContext.applyClipMaskAndFilterIfNecessary())
         return;
 
     BoxPainter(m_layoutSVGRoot).paint(paintContext.paintInfo(), LayoutPoint());
 
     PaintTiming& timing = PaintTiming::from(m_layoutSVGRoot.node()->document().topDocument());
     timing.markFirstContentfulPaint();
 }
 
 } // namespace blink