Don't invalidate rect if it's covered by fully invalidated parent's visual rect

third_party/WebKit/LayoutTests/platform/linux/paint/invalidation/scroll-descendant-with-cached-cliprects-expected.txt

 {
   "layers": [
     {
       "name": "LayoutView #document",
       "bounds": [785, 1895],
       "contentsOpaque": true,
       "drawsContent": true,
       "paintInvalidations": [
         {
           "object": "LayoutBlockFlow (positioned) DIV id='scrollpanel'",
           "rect": [677, 252, 100, 100],
           "reason": "subtree"
         },
         {
-          "object": "LayoutBlockFlow (relative positioned) DIV class='container'",
-          "rect": [677, 252, 100, 100],
-          "reason": "subtree"
-        },
-        {
           "object": "LayoutBlockFlow (relative positioned) DIV id='ul'",
           "rect": [677, 252, 100, 100],
           "reason": "subtree"
         },
         {
           "object": "LayoutBlockFlow DIV",
           "rect": [677, 252, 100, 100],
           "reason": "subtree"
         },
         {
@@ skipping 48 matching lines @@
       "object": "LayoutBlockFlow (relative positioned) DIV id='ul'",
       "reason": "subtree"
     },
     {
       "object": "LayoutBlockFlow DIV",
       "reason": "subtree"
     }
   ]
 }