Update paint/invalidation/compositing/scrolling-neg-z-index-descendants-should-cause-repaint.html

The bug no longer reproduces. Remove the failure expectation, rename it
to scrolling-neg-z-index-descendants.html because there is no repaint
needed for the composited neg-z-index layer, and update the baseline.

Bug: 702006
Cq-Include-Trybots: luci.chromium.try:linux_layout_tests_slimming_paint_v2;master.tryserver.blink:linux_trusty_blink_rel
Change-Id: I87f2f2d93b8024a21aed5929f1fe601065db9806
Reviewed-on: https://chromium-review.googlesource.com/1181522
Commit-Queue: Xianzhu Wang <wangxianzhu@chromium.org>
Reviewed-by: Stephen Chenney <schenney@chromium.org>
Cr-Commit-Position: refs/heads/master@{#584628}

third_party/WebKit/LayoutTests/FlagExpectations/enable-slimming-paint-v2

@@ -653,6 +653,7 @@ Bug(none) paint/invalidation/compositing/resize-repaint.html [ Failure ]
 Bug(none) paint/invalidation/compositing/scroll-fixed-layer-no-content.html [ Failure ]
 Bug(none) paint/invalidation/compositing/scroll-fixed-layer-out-of-view.html [ Failure ]
 Bug(none) paint/invalidation/compositing/scroll-fixed-squahed-layer.html [ Failure ]
+Bug(none) paint/invalidation/compositing/scrolling-neg-z-index-descendants.html [ Failure ]
 Bug(none) paint/invalidation/compositing/scrolling-without-painting.html [ Failure ]
 Bug(none) paint/invalidation/compositing/should-not-clip-composited-viewport-scrolling-layer.html [ Failure ]
 Bug(none) paint/invalidation/compositing/should-not-repaint-composited-filter.html [ Failure ]

third_party/WebKit/LayoutTests/TestExpectations

@@ -84,8 +84,6 @@ crbug.com/504613 crbug.com/524248 [ Mac ] paint/images/image-backgrounds-not-ant
 
 crbug.com/619103 paint/invalidation/background/background-resize-width.html [ Failure Pass ]
 
-crbug.com/702006 paint/invalidation/compositing/scrolling-neg-z-index-descendants-should-cause-repaint.html [ Failure ]
-
 crbug.com/784956 fast/history/frameset-repeated-name.html [ Pass Failure ]
 
 crbug.com/829740 fast/history/history-back-twice-with-subframes-assert.html [ Pass Timeout ]

third_party/WebKit/LayoutTests/paint/invalidation/compositing/scrolling-neg-z-index-descendants-should-cause-repaint-expected.txt → third_party/WebKit/LayoutTests/paint/invalidation/compositing/scrolling-neg-z-index-descendants-expected.txt

@@ -4,42 +4,80 @@
       "name": "LayoutView #document",
       "bounds": [800, 600],
       "drawsContent": false,
+      "backgroundColor": "#FFFFFF"
+    },
+    {
+      "name": "Scrolling Layer",
+      "bounds": [800, 600],
+      "drawsContent": false
+    },
+    {
+      "name": "Scrolling Contents Layer",
+      "bounds": [800, 600],
       "contentsOpaque": true,
-      "drawsContent": true
+      "drawsContent": false,
+      "backgroundColor": "#FFFFFF"
+    },
+    {
+      "name": "LayoutBlockFlow HTML",
+      "bounds": [800, 318]
+    },
+    {
+      "name": "LayoutBlockFlow (relative positioned) DIV id='neg-z'",
+      "position": [9, -81],
+      "bounds": [100, 410]
+    },
+    {
+      "name": "LayoutBlockFlow HTML (foreground) Layer",
+      "bounds": [800, 318]
     },
     {
       "name": "LayoutBlockFlow (relative positioned) DIV id='container'",
       "position": [8, 8],
       "bounds": [102, 302],
-      "shouldFlattenTransform": false,
-      "drawsContent": true,
       "backfaceVisibility": "hidden"
     },
     {
       "name": "Scrolling Layer",
-      "position": [1, 1],
+      "position": [9, 9],
       "bounds": [100, 300],
-      "shouldFlattenTransform": false
+      "drawsContent": false
     },
     {
       "name": "Scrolling Contents Layer",
-      "bounds": [100, 430]
+      "position": [9, 9],
+      "bounds": [100, 430],
+      "drawsContent": false,
+      "transform": 1
     },
     {
       "name": "Overflow Controls Host Layer",
-      "bounds": [102, 302]
+      "position": [8, 8],
+      "bounds": [102, 302],
+      "drawsContent": false,
+      "backfaceVisibility": "hidden"
     },
     {
       "name": "Horizontal Scrollbar Layer",
-      "position": [1, 301],
-      "bounds": [100, 0],
-      "drawsContent": true
+      "position": [9, 309],
+      "bounds": [100, 0]
     },
     {
       "name": "Vertical Scrollbar Layer",
-      "position": [101, 1],
-      "bounds": [0, 300],
-      "drawsContent": true
+      "position": [109, 9],
+      "bounds": [0, 300]
+    }
+  ],
+  "transforms": [
+    {
+      "id": 1,
+      "transform": [
+        [1, 0, 0, 0],
+        [0, 1, 0, 0],
+        [0, 0, 1, 0],
+        [0, -100, 0, 1]
+      ],
+      "flattenInheritedTransform": false
     }
   ]
 }