Don't apply svg viewport clip when mapping a LayoutSVGRoot's own rect

third_party/WebKit/Source/core/layout/svg/SVGLayoutSupport.cpp

Index: third_party/WebKit/Source/core/layout/svg/SVGLayoutSupport.cpp
diff --git a/third_party/WebKit/Source/core/layout/svg/SVGLayoutSupport.cpp b/third_party/WebKit/Source/core/layout/svg/SVGLayoutSupport.cpp
index 83fe10cc449558e1f07cffeb49d95b341db00594..646a3f4c2311e295d8193b64d956084229ca0688 100644
--- a/third_party/WebKit/Source/core/layout/svg/SVGLayoutSupport.cpp
+++ b/third_party/WebKit/Source/core/layout/svg/SVGLayoutSupport.cpp
@@ -124,6 +124,17 @@ bool SVGLayoutSupport::mapToVisualRectInAncestorSpace(const LayoutObject& object
     AffineTransform rootBorderBoxTransform;
     const LayoutSVGRoot& svgRoot = computeTransformToSVGRoot(object, rootBorderBoxTransform);
     resultRect = transformPaintInvalidationRect(object, rootBorderBoxTransform, localPaintInvalidationRect);
+
+    // Apply initial viewport clip.
+    if (svgRoot.shouldApplyViewportClip()) {
+        LayoutRect clipRect(svgRoot.pixelSnappedBorderBoxRect());
+        if (visualRectFlags & EdgeInclusive) {
+            if (!resultRect.inclusiveIntersect(clipRect))
+                return false;
+        } else {
+            resultRect.intersect(clipRect);
+        }
+    }
     return svgRoot.mapToVisualRectInAncestorSpace(ancestor, resultRect, visualRectFlags);
 }