Don't let PaintInvalidationLocationChange shadow other reasons

third_party/WebKit/LayoutTests/platform/linux/fast/repaint/line-flow-with-floats-2-expected.txt

 {
   "bounds": [800, 600],
   "children": [
     {
       "bounds": [800, 600],
       "contentsOpaque": true,
       "drawsContent": true,
       "paintInvalidations": [
         {
           "object": "LayoutBlockFlow HTML",
@@ skipping 86 matching lines @@
           "reason": "bounds change"
         },
         {
           "object": "LayoutText #text",
           "rect": [303, 420, 67, 19],
           "reason": "bounds change"
         },
         {
           "object": "LayoutBlockFlow (floating) SPAN id='greenFloat'",
           "rect": [372, 384, 48, 81],
-          "reason": "location change"
+          "reason": "bounds change"
         },
         {
           "object": "LayoutBlockFlow (floating) SPAN id='greenFloat'",
           "rect": [372, 383, 48, 81],
-          "reason": "location change"
+          "reason": "bounds change"
         },
         {
           "object": "LayoutBlockFlow (floating) SPAN id='blueFloat'",
           "rect": [14, 364, 48, 65],
-          "reason": "location change"
+          "reason": "bounds change"
         },
         {
           "object": "LayoutBlockFlow (floating) SPAN id='blueFloat'",
           "rect": [14, 363, 48, 65],
-          "reason": "location change"
+          "reason": "bounds change"
         },
         {
           "object": "LayoutText #text",
           "rect": [149, 180, 45, 20],
           "reason": "style change"
         },
         {
           "object": "LayoutView #document",
           "rect": [485, 0, 15, 600],
           "reason": "scroll"
@@ skipping 232 matching lines @@
         },
         {
           "object": "VerticalScrollbar",
           "reason": "scroll"
         }
       ]
     }
   ]
 }