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

third_party/WebKit/LayoutTests/platform/linux/paint/invalidation/svg/js-late-gradient-and-object-creation-expected.txt

 {
   "layers": [
     {
       "name": "LayoutView #document",
       "bounds": [800, 600],
       "contentsOpaque": true,
       "drawsContent": true,
       "paintInvalidations": [
         {
           "object": "LayoutSVGContainer g id='content'",
           "rect": [0, 15, 756, 364],
           "reason": "became visible"
         },
         {
-          "object": "LayoutSVGInlineText #text",
-          "rect": [0, 247, 756, 132],
-          "reason": "layoutObject insertion"
-        },
-        {
           "object": "LayoutSVGText text",
           "rect": [0, 247, 756, 132],
           "reason": "layoutObject insertion"
         },
         {
-          "object": "LayoutSVGInlineText #text",
-          "rect": [0, 130, 595, 132],
-          "reason": "layoutObject insertion"
-        },
-        {
           "object": "LayoutSVGText text",
           "rect": [0, 130, 595, 132],
           "reason": "layoutObject insertion"
         },
         {
-          "object": "LayoutSVGInlineText #text",
-          "rect": [0, 15, 446, 129],
-          "reason": "layoutObject insertion"
-        },
-        {
           "object": "LayoutSVGText text",
           "rect": [0, 15, 446, 129],
           "reason": "layoutObject insertion"
         }
       ]
     }
   ],
   "objectPaintInvalidations": [
     {
       "object": "LayoutSVGResourceLinearGradient linearGradient id='fillLinearGradient'",
@@ skipping 63 matching lines @@
       "object": "LayoutSVGInlineText #text",
       "reason": "layoutObject insertion"
     },
     {
       "object": "InlineTextBox 'Gradient on fill/stroke'",
       "reason": "layoutObject insertion"
     }
   ]
 }