Move the remaining rendering/svg/RenderSVG* files to layout.

Source/core/svg/SVGLengthContext.cpp

Index: Source/core/svg/SVGLengthContext.cpp
diff --git a/Source/core/svg/SVGLengthContext.cpp b/Source/core/svg/SVGLengthContext.cpp
index e11f90e4d300dc929f9c3f74dea55e76964669ae..e3c7dce1f101ed0bd8e860f08e775bc99ff163e5 100644
--- a/Source/core/svg/SVGLengthContext.cpp
+++ b/Source/core/svg/SVGLengthContext.cpp
@@ -194,7 +194,7 @@ static inline LayoutStyle* layoutStyleForLengthResolving(const SVGElement* conte
         currentContext = currentContext->parentNode();
     } while (currentContext);
 
-    // There must be at least a RenderSVGRoot renderer, carrying a style.
+    // There must be at least a LayoutSVGRoot renderer, carrying a style.
     ASSERT_NOT_REACHED();
     return 0;
 }