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

third_party/WebKit/LayoutTests/paint/invalidation/remove-inline-block-descendant-of-flex-expected.txt

 {
   "layers": [
     {
       "name": "LayoutView #document",
       "bounds": [800, 600],
       "contentsOpaque": true,
       "drawsContent": true,
       "paintInvalidations": [
         {
           "object": "LayoutBlockFlow DIV",
           "rect": [0, 100, 100, 300],
           "reason": "forced by layout"
         },
         {
-          "object": "LayoutBlockFlow DIV id='inline-block-2' class='item'",
-          "rect": [0, 200, 100, 100],
-          "reason": "forced by layout"
-        },
-        {
           "object": "LayoutBlockFlow DIV id='inline-block-1' class='item'",
           "rect": [0, 100, 100, 100],
           "reason": "layoutObject removal"
-        },
-        {
-          "object": "LayoutBlockFlow DIV id='inline-block-2' class='item'",
-          "rect": [0, 100, 100, 100],
-          "reason": "forced by layout"
         }
       ]
     }
   ],
   "objectPaintInvalidations": [
     {
       "object": "LayoutBR BR",
       "reason": "layoutObject removal"
     },
     {
@@ skipping 20 matching lines @@
       "object": "LayoutBR BR",
       "reason": "location change"
     },
     {
       "object": "InlineTextBox '\n'",
       "reason": "location change"
     }
   ]
 }