Account for total glyph overflow in CachingWordShaper::width

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,
       "repaintRects": [
-        [303, 420, 66, 19],
-        [275, 420, 64, 19],
+        [303, 420, 67, 19],
+        [275, 420, 65, 19],
         [134, 360, 131, 19],
         [118, 360, 131, 19],
         [65, 380, 304, 59],
         [65, 380, 287, 19],
         [49, 380, 320, 59],
         [49, 380, 303, 19],
         [46, 363, 16, 65],
         [14, 440, 355, 59],
         [14, 420, 355, 79],
         [8, 340, 418, 259]
@@ skipping 55 matching lines @@
         "InlineTextBox 'in a furious passion, and went\n'",
         "InlineTextBox 'stamping about, and'",
         "InlineTextBox 'shouting \u2018Off with his head!\u2019 or \u2018Off with\n'",
         "InlineTextBox 'her head!\u2019 about'",
         "InlineTextBox 'once in a minute.\n'"
       ]
     }
   ]
 }