[RAL] Make sure RenderLayers are invalidated when moved.

LayoutTests/fast/repaint/crbug-371640-expected.txt

Index: LayoutTests/fast/repaint/crbug-371640-expected.txt
diff --git a/LayoutTests/fast/repaint/crbug-371640-expected.txt b/LayoutTests/fast/repaint/crbug-371640-expected.txt
new file mode 100644
index 0000000000000000000000000000000000000000..b5f80e42208eaaca9796a443a952abeee23165bc
--- /dev/null
+++ b/LayoutTests/fast/repaint/crbug-371640-expected.txt
@@ -0,0 +1,18 @@
+(GraphicsLayer
+  (bounds 800.00 600.00)
+  (children 1
+    (GraphicsLayer
+      (bounds 800.00 600.00)
+      (contentsOpaque 1)
+      (drawsContent 1)
+      (repaint rects
+        (rect 348.00 88.00 260.00 100.00)
+        (rect 348.00 88.00 100.00 100.00)
+        (rect 348.00 88.00 100.00 100.00)
+        (rect 348.00 88.00 100.00 100.00)
+        (rect 88.00 88.00 100.00 100.00)
+      )
+    )
+  )
+)
+