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

third_party/WebKit/LayoutTests/paint/invalidation/svg/relative-sized-shadow-tree-content-with-symbol-expected.txt

 {
   "layers": [
     {
       "name": "LayoutView #document",
       "bounds": [800, 600],
       "contentsOpaque": true,
       "drawsContent": true,
       "paintInvalidations": [
         {
           "object": "LayoutBlockFlow div id='contentBox'",
           "rect": [8, 68, 402, 402],
           "reason": "forced by layout"
         },
         {
-          "object": "LayoutSVGContainer use",
-          "rect": [9, 69, 400, 400],
-          "reason": "bounds change"
-        },
-        {
-          "object": "LayoutSVGRoot svg",
-          "rect": [9, 69, 400, 400],
-          "reason": "forced by layout"
-        },
-        {
           "object": "LayoutSVGViewportContainer svg id='targetSymbol'",
           "rect": [9, 69, 400, 400],
           "reason": "bounds change"
         },
         {
           "object": "LayoutSVGRect rect",
           "rect": [209, 269, 200, 200],
           "reason": "bounds change"
         },
         {
@@ skipping 34 matching lines @@
       "object": "LayoutSVGRect rect",
       "reason": "bounds change"
     },
     {
       "object": "LayoutSVGRect rect",
       "reason": "bounds change"
     }
   ]
 }