Dirty nearby lineboxes if we layout a float rather than trying to work it out later

LayoutTests/platform/linux/fast/repaint/line-flow-with-floats-6-expected.txt

 {
   "bounds": [800, 600],
   "children": [
     {
       "bounds": [800, 600],
       "contentsOpaque": true,
       "drawsContent": true,
       "repaintRects": [
         [28, 363, 20, 19],
         [14, 363, 48, 64],
-        [8, 580, 418, 19]
+        [8, 320, 418, 79]
       ],
       "paintInvalidationClients": [
-        "InlineTextBox 'wonder is, that there\u2018s any one left alive!\u2019'",
+        "InlineTextBox 'doubled-up\n'",
+        "InlineTextBox 'soldiers were always getting up and walking off to'",
+        "RootInlineBox",
+        "InlineTextBox 'other parts of\n'",
+        "InlineTextBox 'the ground, Alice soon came to the conclusion that it'",
+        "RootInlineBox",
+        "InlineTextBox 'was a very\n'",
+        "InlineTextBox 'difficult game indeed.\n'",
+        "RootInlineBox",
+        "InlineTextBox 'The players all played at once without waiting\n'",
+        "InlineTextBox 'for'",
         "RootInlineBox",
         "LayoutBlockFlow P",
         "LayoutBlockFlow (floating) SPAN id='blueFloat'",
         "LayoutText #text",
         "InlineTextBox 'foo'"
       ]
     }
   ]
 }