Don't let PaintInvalidationLocationChange shadow other reasons

third_party/WebKit/LayoutTests/platform/linux/fast/repaint/text-match-document-change-expected.txt

 {
   "bounds": [800, 600],
   "children": [
     {
       "bounds": [800, 600],
       "contentsOpaque": true,
       "drawsContent": true,
       "paintInvalidations": [
         {
           "object": "LayoutBlockFlow HTML",
           "rect": [10, 102, 285, 400],
           "reason": "forced by layout"
         },
         {
           "object": "LayoutBlockFlow DIV",
           "rect": [18, 150, 269, 352],
-          "reason": "location change"
+          "reason": "bounds change"
         },
         {
           "object": "LayoutBlockFlow DIV id='to-be-changed'",
           "rect": [18, 130, 269, 40],
           "reason": "forced by layout"
         },
         {
           "object": "LayoutText #text",
           "rect": [18, 130, 235, 39],
           "reason": "layoutObject removal"
         },
         {
           "object": "LayoutText #text",
           "rect": [18, 130, 77, 19],
-          "reason": "location change"
+          "reason": "layoutObject insertion"
         },
         {
           "object": "LayoutView #document",
           "rect": [295, 102, 15, 400],
           "reason": "scroll"
         },
         {
           "object": "InlineTextBox 'After change'",
-          "reason": "location change"
+          "reason": "layoutObject insertion"
         },
         {
           "object": "InlineTextBox 'Find-in-page 'findme', then click here)'",
           "reason": "full"
         },
         {
           "object": "InlineTextBox 'To be changed: findme (Manual testing:'",
           "reason": "full"
         },
         {
@@ skipping 10 matching lines @@
         },
         {
           "object": "VerticalScrollbar",
           "reason": "scroll"
         }
       ]
     }
   ]
 }