Tweak PaintInvalidationReasons

third_party/WebKit/LayoutTests/compositing/squashing/add-remove-squashed-layers-expected.txt

 Test that layers can be nicely added or removed from a squashed layer, without unnecessary repaints on any layer. Click anywhere to test interactively; keep clicking to proceed through the test.
 
 CASE 1, original layer tree with overlap1 and overlap2:
 {
   "layers": [
     {
       "name": "LayoutView #document",
       "bounds": [800, 600],
       "contentsOpaque": true,
       "drawsContent": true
@@ skipping 41 matching lines @@
     },
     {
       "name": "Squashing Layer (first squashed layer: LayoutBlockFlow (positioned) DIV id='A' class='overlap1')",
       "position": [140, 140],
       "bounds": [260, 260],
       "drawsContent": true,
       "paintInvalidations": [
         {
           "object": "LayoutBlockFlow (positioned) DIV id='C' class='overlap3'",
           "rect": [160, 160, 100, 100],
-          "reason": "layoutObject insertion"
+          "reason": "appeared"
         }
       ]
     }
   ],
   "objectPaintInvalidations": [
     {
       "object": "LayoutBlockFlow (positioned) DIV id='C' class='overlap3'",
       "reason": "subtree"
     },
     {
       "object": "LayoutBlockFlow (positioned) DIV id='C' class='overlap3'",
-      "reason": "layoutObject insertion"
+      "reason": "appeared"
     }
   ]
 }
 CASE 3, overlap2 gets removed. Since this does not resize the layer, there should only be a repaint of overlap2:
 {
   "layers": [
     {
       "name": "LayoutView #document",
       "bounds": [800, 600],
       "contentsOpaque": true,
@@ skipping 13 matching lines @@
     },
     {
       "name": "Squashing Layer (first squashed layer: LayoutBlockFlow (positioned) DIV id='A' class='overlap1')",
       "position": [140, 140],
       "bounds": [260, 260],
       "drawsContent": true,
       "paintInvalidations": [
         {
           "object": "LayoutBlockFlow (positioned) DIV id='B' class='overlap2'",
           "rect": [80, 80, 100, 100],
-          "reason": "layoutObject removal"
+          "reason": "disappeared"
         }
       ]
     }
   ],
   "objectPaintInvalidations": [
     {
       "object": "LayoutBlockFlow (positioned) DIV id='B' class='overlap2'",
-      "reason": "layoutObject removal"
+      "reason": "disappeared"
     }
   ]
 }
 CASE 4, overlap1 gets removed:
 {
   "layers": [
     {
       "name": "LayoutView #document",
       "bounds": [800, 600],
       "contentsOpaque": true,
@@ skipping 18 matching lines @@
       "drawsContent": true,
       "paintInvalidations": [
         {
           "object": "LayoutBlockFlow (positioned) DIV id='C' class='overlap3'",
           "rect": [160, 160, 100, 100],
           "reason": "subtree"
         },
         {
           "object": "LayoutBlockFlow (positioned) DIV id='A' class='overlap1'",
           "rect": [0, 0, 100, 100],
-          "reason": "layoutObject removal"
+          "reason": "disappeared"
         },
         {
           "object": "LayoutBlockFlow (positioned) DIV id='C' class='overlap3'",
           "rect": [0, 0, 100, 100],
           "reason": "compositing update"
         }
       ]
     }
   ],
   "objectPaintInvalidations": [
     {
       "object": "LayoutBlockFlow (positioned) DIV id='A' class='overlap1'",
-      "reason": "layoutObject removal"
+      "reason": "disappeared"
     },
     {
       "object": "LayoutBlockFlow (positioned) DIV id='C' class='overlap3'",
       "reason": "subtree"
     },
     {
       "object": "LayoutBlockFlow (positioned) DIV id='C' class='overlap3'",
       "reason": "compositing update"
     }
   ]
@@ skipping 26 matching lines @@
       "drawsContent": true,
       "paintInvalidations": [
         {
           "object": "LayoutBlockFlow (positioned) DIV id='C' class='overlap3'",
           "rect": [80, 80, 100, 100],
           "reason": "compositing update"
         },
         {
           "object": "LayoutBlockFlow (positioned) DIV id='B' class='overlap2'",
           "rect": [0, 0, 100, 100],
-          "reason": "layoutObject insertion"
+          "reason": "appeared"
         },
         {
           "object": "LayoutBlockFlow (positioned) DIV id='C' class='overlap3'",
           "rect": [0, 0, 100, 100],
           "reason": "subtree"
         }
       ]
     }
   ],
   "objectPaintInvalidations": [
     {
       "object": "LayoutBlockFlow (positioned) DIV id='B' class='overlap2'",
       "reason": "subtree"
     },
     {
       "object": "LayoutBlockFlow (positioned) DIV id='C' class='overlap3'",
       "reason": "subtree"
     },
     {
       "object": "LayoutBlockFlow (positioned) DIV id='C' class='overlap3'",
       "reason": "subtree"
     },
     {
       "object": "LayoutBlockFlow (positioned) DIV id='B' class='overlap2'",
-      "reason": "layoutObject insertion"
+      "reason": "appeared"
     },
     {
       "object": "LayoutBlockFlow (positioned) DIV id='C' class='overlap3'",
       "reason": "compositing update"
     }
   ]
 }
 CASE 6, overlap1 gets added back, and overlap3 gets removed:
 {
   "layers": [
@@ skipping 22 matching lines @@
       "drawsContent": true,
       "paintInvalidations": [
         {
           "object": "LayoutBlockFlow (positioned) DIV id='B' class='overlap2'",
           "rect": [80, 80, 100, 100],
           "reason": "compositing update"
         },
         {
           "object": "LayoutBlockFlow (positioned) DIV id='C' class='overlap3'",
           "rect": [80, 80, 100, 100],
-          "reason": "layoutObject removal"
+          "reason": "disappeared"
         },
         {
           "object": "LayoutBlockFlow (positioned) DIV id='A' class='overlap1'",
           "rect": [0, 0, 100, 100],
-          "reason": "layoutObject insertion"
+          "reason": "appeared"
         },
         {
           "object": "LayoutBlockFlow (positioned) DIV id='B' class='overlap2'",
           "rect": [0, 0, 100, 100],
           "reason": "subtree"
         }
       ]
     }
   ],
   "objectPaintInvalidations": [
     {
       "object": "LayoutBlockFlow (positioned) DIV id='C' class='overlap3'",
-      "reason": "layoutObject removal"
+      "reason": "disappeared"
     },
     {
       "object": "LayoutBlockFlow (positioned) DIV id='A' class='overlap1'",
       "reason": "subtree"
     },
     {
       "object": "LayoutBlockFlow (positioned) DIV id='B' class='overlap2'",
       "reason": "subtree"
     },
     {
       "object": "LayoutBlockFlow (positioned) DIV id='B' class='overlap2'",
       "reason": "subtree"
     },
     {
       "object": "LayoutBlockFlow (positioned) DIV id='A' class='overlap1'",
-      "reason": "layoutObject insertion"
+      "reason": "appeared"
     },
     {
       "object": "LayoutBlockFlow (positioned) DIV id='B' class='overlap2'",
       "reason": "compositing update"
     }
   ]
 }