Move the SVG container code from rendering/svg to layout/svg.

Source/core/layout/svg/LayoutSVGContainer.h

Index: Source/core/layout/svg/LayoutSVGContainer.h
diff --git a/Source/core/layout/svg/LayoutSVGContainer.h b/Source/core/layout/svg/LayoutSVGContainer.h
index aa9f0e894f3be9049fa8166fcd8825e3bf0e940d..26f41d4b2e07e7efd8fa7b9d7accc5049f6d7b24 100644
--- a/Source/core/layout/svg/LayoutSVGContainer.h
+++ b/Source/core/layout/svg/LayoutSVGContainer.h
@@ -68,10 +68,10 @@ protected:
 
     virtual bool nodeAtFloatPoint(const HitTestRequest&, HitTestResult&, const FloatPoint& pointInParent, HitTestAction) override;
 
-    // Allow RenderSVGTransformableContainer to hook in at the right time in layout().
+    // Allow LayoutSVGTransformableContainer to hook in at the right time in layout().
     virtual bool calculateLocalTransform() { return false; }
 
-    // Allow RenderSVGViewportContainer to hook in at the right times in layout() and nodeAtFloatPoint().
+    // Allow LayoutSVGViewportContainer to hook in at the right times in layout() and nodeAtFloatPoint().
     virtual void calcViewport() { }
     virtual bool pointIsInsideViewportClip(const FloatPoint& /*pointInParent*/) { return true; }