Dirty line boxes correctly when a float gets layout

third_party/WebKit/LayoutTests/platform/linux/fast/repaint/line-flow-with-floats-5-expected.txt

 {
   "bounds": [800, 600],
   "children": [
     {
       "bounds": [800, 600],
       "contentsOpaque": true,
       "drawsContent": true,
       "paintInvalidations": [
         {
           "object": "LayoutBlockFlow P",
-          "rect": [8, 340, 418, 259],
+          "rect": [8, 320, 418, 279],
           "reason": "invalidate paint rectangle"
         },
         {
           "object": "LayoutText #text",
           "rect": [14, 420, 355, 79],
           "reason": "bounds change"
         },
         {
           "object": "LayoutText #text",
           "rect": [49, 380, 320, 59],
@@ skipping 63 matching lines @@
         },
         {
           "object": "InlineTextBox 'difficult game indeed.\n'",
           "reason": "full"
         },
         {
           "object": "InlineTextBox 'difficult game indeed.\n'",
           "reason": "bounds change"
         },
         {
+          "object": "InlineTextBox 'doubled-up\n'",
+          "reason": "full"
+        },
+        {
           "object": "InlineTextBox 'for'",
           "reason": "full"
         },
         {
           "object": "InlineTextBox 'for'",
           "reason": "bounds change"
         },
         {
           "object": "InlineTextBox 'happen any'",
           "reason": "full"
@@ skipping 48 matching lines @@
         },
         {
           "object": "InlineTextBox 'shouting \u2018Off with his head!\u2019 or \u2018Off with\n'",
           "reason": "full"
         },
         {
           "object": "InlineTextBox 'shouting \u2018Off with his head!\u2019 or \u2018Off with\n'",
           "reason": "bounds change"
         },
         {
+          "object": "InlineTextBox 'soldiers were always getting up and walking off to'",
+          "reason": "full"
+        },
+        {
           "object": "InlineTextBox 'stamping about, and'",
           "reason": "full"
         },
         {
           "object": "InlineTextBox 'stamping about, and'",
           "reason": "bounds change"
         },
         {
           "object": "InlineTextBox 'the Queen'",
           "reason": "full"
@@ skipping 74 matching lines @@
           "object": "RootInlineBox",
           "reason": "full"
         },
         {
           "object": "RootInlineBox",
           "reason": "full"
         },
         {
           "object": "RootInlineBox",
           "reason": "full"
+        },
+        {
+          "object": "RootInlineBox",
+          "reason": "full"
         }
       ]
     }
   ]
 }