Invalidate the frame view when changing the background image of the document or body.

LayoutTests/fast/repaint/window-resize-positioned-percent-top-expected.txt

 {
   "bounds": [200, 300],
   "children": [
     {
       "bounds": [200, 300],
       "contentsOpaque": true,
       "drawsContent": true,
       "repaintRects": [
         [0, 200, 200, 100],
         [0, 150, 20, 20],
         [0, 100, 20, 20]
       ]
     }
   ]
 }
 {
   "bounds": [300, 300],
   "children": [
     {
       "bounds": [300, 300],
       "contentsOpaque": true,
       "drawsContent": true,
       "repaintRects": [
         [0, 0, 300, 300],
-        [0, 0, 200, 300]
+        [0, 0, 300, 300]
       ]
     }
   ]
 }
 {
   "bounds": [300, 250],
   "children": [
     {
       "bounds": [300, 250],
       "contentsOpaque": true,
       "drawsContent": true,
       "repaintRects": [
         [0, 250, 300, 50],
         [0, 150, 20, 20],
         [0, 125, 20, 20]
       ]
     }
   ]
 }
 {
   "bounds": [250, 250],
   "children": [
     {
       "bounds": [250, 250],
       "contentsOpaque": true,
       "drawsContent": true,
       "repaintRects": [
-        [0, 0, 300, 250],
+        [0, 0, 250, 250],
         [0, 0, 250, 250]
       ]
     }
   ]
 }