Don't let PaintInvalidationLocationChange shadow other reasons

third_party/WebKit/LayoutTests/platform/linux/fast/repaint/line-flow-with-floats-3-expected.txt

 {
   "bounds": [800, 600],
   "children": [
     {
       "bounds": [800, 600],
       "contentsOpaque": true,
       "drawsContent": true,
       "paintInvalidations": [
         {
           "object": "LayoutBlockFlow P",
@@ skipping 11 matching lines @@
           "reason": "bounds change"
         },
         {
           "object": "LayoutText #text",
           "rect": [303, 420, 67, 19],
           "reason": "bounds change"
         },
         {
           "object": "LayoutBlockFlow (floating) SPAN id='greenFloat'",
           "rect": [356, 383, 64, 81],
-          "reason": "location change"
+          "reason": "bounds change"
         },
         {
           "object": "LayoutText #text",
           "rect": [353, 440, 16, 59],
           "reason": "incremental"
         },
         {
           "object": "LayoutText #text",
           "rect": [352, 380, 2, 19],
           "reason": "incremental"
@@ skipping 168 matching lines @@
         },
         {
           "object": "RootInlineBox",
           "reason": "full"
         }
       ]
     }
   ]
 }