Fix gradient background invalidation when HTML size changes

third_party/WebKit/LayoutTests/platform/linux/paint/invalidation/window-resize-vertical-writing-mode-expected.txt

 {
   "layers": [
     {
       "name": "LayoutView #document",
       "bounds": [939, 235],
       "contentsOpaque": true,
       "drawsContent": true,
       "paintInvalidations": [
         {
-          "object": "LayoutBlockFlow HTML",
-          "rect": [0, 0, 939, 235],
-          "reason": "forced by layout"
-        },
-        {
           "object": "LayoutView #document",
           "rect": [0, 0, 939, 235],
           "reason": "bounds change"
         },
         {
           "object": "LayoutBlockFlow BODY",
           "rect": [8, 8, 923, 219],
           "reason": "forced by layout"
         },
         {
@@ skipping 10 matching lines @@
           "object": "LayoutView #document",
           "rect": [0, 0, 600, 500],
           "reason": "full"
         },
         {
           "object": "LayoutView #document",
           "rect": [339, 235, 600, 15],
           "reason": "scroll"
         },
         {
-          "object": "LayoutBlockFlow HTML",
-          "rect": [497, 0, 442, 500],
-          "reason": "forced by layout"
-        },
-        {
           "object": "LayoutBlockFlow BODY",
           "rect": [505, 8, 426, 484],
           "reason": "forced by layout"
         },
         {
           "object": "LayoutText #text",
           "rect": [507, 7, 423, 471],
           "reason": "forced by layout"
         }
       ]
     }
   ],
   "objectPaintInvalidations": [
     {
       "object": "LayoutView #document",
       "reason": "scroll"
     },
     {
       "object": "LayoutView #document",
       "reason": "bounds change"
     },
     {
-      "object": "LayoutBlockFlow HTML",
-      "reason": "forced by layout"
-    },
-    {
       "object": "LayoutBlockFlow BODY",
       "reason": "forced by layout"
     },
     {
       "object": "RootInlineBox",
       "reason": "forced by layout"
     },
     {
       "object": "LayoutText #text",
       "reason": "forced by layout"
@@ skipping 190 matching lines @@
       "bounds": [400, 600],
       "contentsOpaque": true,
       "drawsContent": true,
       "paintInvalidations": [
         {
           "object": "LayoutView #document",
           "rect": [0, 0, 939, 235],
           "reason": "full"
         },
         {
-          "object": "LayoutBlockFlow HTML",
-          "rect": [-539, 0, 939, 235],
-          "reason": "forced by layout"
-        },
-        {
           "object": "LayoutView #document",
           "rect": [-539, 0, 939, 235],
           "reason": "bounds change"
         },
         {
           "object": "LayoutBlockFlow BODY",
           "rect": [-531, 8, 923, 219],
           "reason": "forced by layout"
         },
         {
           "object": "LayoutText #text",
           "rect": [-529, 7, 920, 213],
           "reason": "forced by layout"
         },
         {
           "object": "LayoutView #document",
           "rect": [0, 0, 400, 600],
           "reason": "bounds change"
         },
         {
           "object": "LayoutView #document",
           "rect": [0, 235, 400, 15],
           "reason": "scroll"
         },
         {
-          "object": "LayoutBlockFlow HTML",
-          "rect": [29, 0, 371, 600],
-          "reason": "forced by layout"
-        },
-        {
           "object": "LayoutBlockFlow BODY",
           "rect": [37, 8, 355, 584],
           "reason": "forced by layout"
         },
         {
           "object": "LayoutText #text",
           "rect": [39, 7, 352, 554],
           "reason": "forced by layout"
         }
       ]
     }
   ],
   "objectPaintInvalidations": [
     {
       "object": "LayoutView #document",
       "reason": "scroll"
     },
     {
       "object": "LayoutView #document",
       "reason": "bounds change"
     },
     {
-      "object": "LayoutBlockFlow HTML",
-      "reason": "forced by layout"
-    },
-    {
       "object": "LayoutBlockFlow BODY",
       "reason": "forced by layout"
     },
     {
       "object": "RootInlineBox",
       "reason": "forced by layout"
     },
     {
       "object": "LayoutText #text",
       "reason": "forced by layout"
@@ skipping 27 matching lines @@
       "bounds": [800, 600],
       "contentsOpaque": true,
       "drawsContent": true,
       "paintInvalidations": [
         {
           "object": "LayoutView #document",
           "rect": [400, 0, 400, 600],
           "reason": "incremental"
         },
         {
-          "object": "LayoutBlockFlow HTML",
-          "rect": [429, 0, 371, 600],
-          "reason": "forced by layout"
-        },
-        {
-          "object": "LayoutBlockFlow HTML",
-          "rect": [29, 0, 371, 600],
-          "reason": "forced by layout"
-        },
-        {
           "object": "LayoutBlockFlow BODY",
           "rect": [437, 8, 355, 584],
           "reason": "forced by layout"
         },
         {
           "object": "LayoutBlockFlow BODY",
           "rect": [37, 8, 355, 584],
           "reason": "forced by layout"
         },
         {
           "object": "LayoutText #text",
           "rect": [439, 7, 352, 554],
           "reason": "forced by layout"
         },
         {
           "object": "LayoutText #text",
           "rect": [39, 7, 352, 554],
           "reason": "forced by layout"
         }
       ]
     }
   ],
   "objectPaintInvalidations": [
     {
       "object": "LayoutView #document",
       "reason": "incremental"
     },
     {
-      "object": "LayoutBlockFlow HTML",
-      "reason": "forced by layout"
-    },
-    {
       "object": "LayoutBlockFlow BODY",
       "reason": "forced by layout"
     },
     {
       "object": "RootInlineBox",
       "reason": "forced by layout"
     },
     {
       "object": "LayoutText #text",
       "reason": "forced by layout"
@@ skipping 14 matching lines @@
       "object": "InlineTextBox 'KKKK LLLL MMMM'",
       "reason": "forced by layout"
     },
     {
       "object": "InlineTextBox 'NNNN'",
       "reason": "forced by layout"
     }
   ]
 }