Update reason after full paint invalidation

third_party/WebKit/LayoutTests/platform/win/paint/invalidation/forms/range-focus-by-mouse-then-keydown-expected.txt

 {
   "layers": [
     {
       "name": "LayoutView #document",
       "bounds": [800, 600],
       "contentsOpaque": true,
       "drawsContent": true,
       "paintInvalidations": [
         {
           "object": "LayoutSlider INPUT",
           "rect": [9, 9, 131, 23],
           "reason": "subtree"
-        },
-        {
-          "object": "LayoutBlockFlow DIV id='track'",
-          "rect": [10, 10, 129, 21],
-          "reason": "subtree"
-        },
-        {
-          "object": "LayoutBlockFlow DIV id='thumb'",
-          "rect": [69, 10, 11, 21],
-          "reason": "subtree"
         }
       ]
     }
   ],
   "objectPaintInvalidations": [
     {
       "object": "LayoutSlider INPUT",
       "reason": "subtree"
     },
     {
       "object": "LayoutFlexibleBox DIV",
       "reason": "subtree"
     },
     {
       "object": "LayoutBlockFlow DIV id='track'",
       "reason": "subtree"
     },
     {
       "object": "LayoutBlockFlow DIV id='thumb'",
       "reason": "subtree"
     }
   ]
 }