Tweak priorities of paint invalidation reasons

third_party/WebKit/LayoutTests/svg/custom/js-late-mask-and-object-creation-expected.txt

 {
   "name": "Content Root Layer",
   "bounds": [800, 600],
   "children": [
     {
       "name": "LayoutView #document",
       "bounds": [800, 600],
       "contentsOpaque": true,
       "drawsContent": true,
       "paintInvalidations": [
         {
           "object": "LayoutSVGRect rect",
           "rect": [0, 0, 800, 300],
           "reason": "layoutObject insertion"
         },
         {
           "object": "LayoutSVGContainer g id='content'",
           "rect": [0, 100, 800, 100],
-          "reason": "bounds change"
+          "reason": "became visible"
         },
         {
           "object": "LayoutSVGRect rect",
           "rect": [0, 100, 800, 100],
           "reason": "style change"
         },
         {
           "object": "LayoutSVGRect rect",
           "rect": [0, 100, 800, 100],
           "reason": "layoutObject insertion"
         },
         {
           "object": "LayoutSVGRoot svg id='svg-root'",
           "rect": [0, 100, 800, 100],
-          "reason": "bounds change"
+          "reason": "became visible"
         }
       ]
     }
   ],
   "objectPaintInvalidations": [
     {
       "object": "LayoutSVGRoot svg id='svg-root'",
-      "reason": "bounds change"
+      "reason": "became visible"
     },
     {
       "object": "LayoutSVGContainer g id='content'",
-      "reason": "bounds change"
+      "reason": "became visible"
     },
     {
       "object": "LayoutSVGRect rect",
       "reason": "layoutObject insertion"
     },
     {
       "object": "LayoutSVGRect rect",
       "reason": "style change"
     },
     {
       "object": "LayoutSVGResourceMasker mask id='dynMask'",
       "reason": "layoutObject insertion"
     },
     {
       "object": "LayoutSVGRect rect",
       "reason": "layoutObject insertion"
     }
   ]
 }