Fix computation of local-to-border-box transform for RenderSVGRoot

Source/core/rendering/svg/RenderSVGRoot.cpp

Index: Source/core/rendering/svg/RenderSVGRoot.cpp
diff --git a/Source/core/rendering/svg/RenderSVGRoot.cpp b/Source/core/rendering/svg/RenderSVGRoot.cpp
index 0416eddc184087846a0976f48300cc2743b85db5..43495c65f464a288bd3716dfa2d0ae8731ed9257 100644
--- a/Source/core/rendering/svg/RenderSVGRoot.cpp
+++ b/Source/core/rendering/svg/RenderSVGRoot.cpp
@@ -337,9 +337,10 @@ void RenderSVGRoot::buildLocalToBorderBoxTransform()
     FloatPoint translate = svg->currentTranslate();
     LayoutSize borderAndPadding(borderLeft() + paddingLeft(), borderTop() + paddingTop());
     m_localToBorderBoxTransform = svg->viewBoxToViewTransform(contentWidth() / scale, contentHeight() / scale);
-    if (borderAndPadding.isEmpty() && scale == 1 && translate == FloatPoint::zero())
+    AffineTransform viewToBorderBoxTransform(scale, 0, 0, scale, borderAndPadding.width() + translate.x(), borderAndPadding.height() + translate.y());
+    if (viewToBorderBoxTransform.isIdentity())
         return;
-    m_localToBorderBoxTransform = AffineTransform(scale, 0, 0, scale, borderAndPadding.width() + translate.x(), borderAndPadding.height() + translate.y()) * m_localToBorderBoxTransform;
+    m_localToBorderBoxTransform = viewToBorderBoxTransform * m_localToBorderBoxTransform;
 }
 
 const AffineTransform& RenderSVGRoot::localToParentTransform() const