Include VisualViewport layers in layerTreeAsText output.

third_party/WebKit/LayoutTests/compositing/fixed-body-background-positioned-expected.txt

Index: third_party/WebKit/LayoutTests/compositing/fixed-body-background-positioned-expected.txt
diff --git a/third_party/WebKit/LayoutTests/compositing/fixed-body-background-positioned-expected.txt b/third_party/WebKit/LayoutTests/compositing/fixed-body-background-positioned-expected.txt
index 4c9b383ddae544a089b328a03976e090f3f1ad84..7626c39d6de022262806276b5a1d0547de06f60c 100644
--- a/third_party/WebKit/LayoutTests/compositing/fixed-body-background-positioned-expected.txt
+++ b/third_party/WebKit/LayoutTests/compositing/fixed-body-background-positioned-expected.txt
@@ -1,6 +1,24 @@
 {
   "layers": [
     {
+      "name": "Inner Viewport Container Layer",
+      "bounds": [800, 600]
+    },
+    {
+      "name": "Overscroll Elasticity Layer"
+    },
+    {
+      "name": "Page Scale Layer"
+    },
+    {
+      "name": "Inner Viewport Scroll Layer",
+      "bounds": [800, 600]
+    },
+    {
+      "name": "Frame Overflow Controls Host Layer",
+      "bounds": [800, 600]
+    },
+    {
       "name": "Frame Clipping Layer",
       "bounds": [785, 600]
     },
@@ -22,6 +40,12 @@
       "name": "LayoutView #document",
       "bounds": [785, 3700],
       "drawsContent": true
+    },
+    {
+      "name": "Frame Vertical Scrollbar Layer",
+      "position": [785, 0],
+      "bounds": [15, 600],
+      "contentsOpaque": true
     }
   ]
 }