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

third_party/WebKit/LayoutTests/paint/invalidation/shift-relative-positioned-container-with-image-addition-expected.txt

 {
   "layers": [
     {
       "name": "LayoutView #document",
       "bounds": [785, 829],
       "contentsOpaque": true,
       "drawsContent": true,
       "paintInvalidations": [
         {
           "object": "LayoutView #document",
           "rect": [0, 735, 785, 94],
           "reason": "incremental"
         },
         {
           "object": "LayoutBlockFlow (relative positioned) DIV class='relative paddingTop'",
           "rect": [8, 180, 769, 641],
           "reason": "bounds change"
         },
         {
           "object": "LayoutBlockFlow (relative positioned) DIV class='relative paddingTop'",
           "rect": [8, 86, 769, 641],
           "reason": "bounds change"
         },
         {
           "object": "LayoutIFrame IFRAME id='iframe'",
           "rect": [8, 86, 732, 94],
           "reason": "layoutObject insertion"
         },
         {
-          "object": "LayoutBlockFlow HTML",
-          "rect": [10, 88, 728, 90],
-          "reason": "layoutObject insertion"
-        },
-        {
           "object": "LayoutView #document",
           "rect": [10, 88, 728, 90],
           "reason": "style change"
         },
         {
-          "object": "LayoutBlockFlow BODY",
-          "rect": [18, 96, 712, 74],
-          "reason": "layoutObject insertion"
-        },
-        {
           "object": "LayoutImage IMG",
           "rect": [58, 230, 489, 537],
           "reason": "bounds change"
         },
         {
           "object": "LayoutImage IMG",
           "rect": [58, 136, 489, 537],
           "reason": "bounds change"
         }
       ]
@@ skipping 36 matching lines @@
       "object": "LayoutBlockFlow HTML",
       "reason": "layoutObject insertion"
     },
     {
       "object": "LayoutBlockFlow BODY",
       "reason": "layoutObject insertion"
     }
   ]
 }