Don't pixel snap for ellipsis

LayoutTests/platform/mac/css1/box_properties/float_on_text_elements-expected.txt

 layer at (0,0) size 785x2714
   RenderView at (0,0) size 785x600
 layer at (0,0) size 785x2714
   RenderBlock {HTML} at (0,0) size 785x2714
     RenderBody {BODY} at (8,8) size 769x2698 [bgcolor=#CCCCCC]
       RenderBlock (floating) {P} at (0,0) size 384.50x36 [bgcolor=#FFFF00]
         RenderText {#text} at (0,0) size 384x36
           text run at (0,0) width 384: "This paragraph is of class \"one\". It has a width of 50% and"
           text run at (0,18) width 124: "is floated to the left."
       RenderBlock {P} at (0,0) size 769x90
@@ skipping 120 matching lines @@
             text run at (0,36) width 192: "background is blue and the"
             text run at (0,54) width 87: "width is 25%."
       RenderBlock (floating) {DIV} at (576.75,1079) size 192.25x72 [bgcolor=#FFFF00]
         RenderBlock {P} at (0,0) size 192.25x72
           RenderText {#text} at (0,0) size 192x72
             text run at (0,0) width 192: "This paragraph is inside a"
             text run at (0,18) width 192: "DIV which is floated right. Its"
             text run at (0,36) width 192: "background is yellow and the"
             text run at (0,54) width 87: "width is 25%."
       RenderBlock {P} at (0,1079) size 769x36
-        RenderText {#text} at (192,0) size 384x36
-          text run at (192,0) width 384: "This paragraph should appear between a blue box (on the"
+        RenderText {#text} at (192,0) size 385x36
+          text run at (192,0) width 385: "This paragraph should appear between a blue box (on the"
           text run at (192,18) width 30: "left) "
           text run at (221,18) width 200: "and a yellow box (on the right)."
       RenderBlock (anonymous) at (0,1115) size 769x36
         RenderBR {BR} at (192,0) size 1x18
       RenderBlock {HR} at (0,1159) size 769x2 [border: (1px inset #EEEEEE)]
       RenderBlock (floating) {DIV} at (0,1169) size 576.75x126 [bgcolor=#66CCFF]
         RenderBlock (floating) {DIV} at (422.56,0) size 144.19x36 [bgcolor=#FFFF00]
           RenderBlock {P} at (0,0) size 144.19x36
             RenderText {#text} at (0,0) size 144x36
               text run at (0,0) width 144: "See description in the"
               text run at (0,18) width 124: "box on the left side."
         RenderBlock {P} at (0,0) size 576.75x126
           RenderText {#text} at (0,0) size 576x126
             text run at (0,0) width 422: "This paragraph is inside a DIV which is floated left. The"
             text run at (0,18) width 422: "background of the DIV element is blue and its width is 75%. This"
-            text run at (0,36) width 364: "text should all be inside the blue rectangle. The blue DIV "
-            text run at (364,36) width 212: "element has another DIV element"
+            text run at (0,36) width 365: "text should all be inside the blue rectangle. The blue DIV "
+            text run at (365,36) width 211: "element has another DIV element"
             text run at (0,54) width 166: "as a child. It has a yellow "
-            text run at (166,54) width 361: "background color and is floated to the right. Since it is a "
-            text run at (527,54) width 49: "child of"
+            text run at (166,54) width 362: "background color and is floated to the right. Since it is a "
+            text run at (528,54) width 48: "child of"
             text run at (0,72) width 374: "the blue DIV, the yellow DIV should appear inside the "
             text run at (374,72) width 202: "blue rectangle. Due to it being"
             text run at (0,90) width 193: "floated to the right and having "
             text run at (193,90) width 383: "a 10px right margin, the yellow rectange should have a 10px"
             text run at (0,108) width 31: "blue "
             text run at (31,108) width 138: "stripe on its right side."
       RenderBlock (anonymous) at (0,1169) size 769x126
         RenderBR {BR} at (576,0) size 1x18
       RenderBlock {HR} at (0,1303) size 769x2 [border: (1px inset #EEEEEE)]
       RenderTable {TABLE} at (0,1313) size 769x1385 [border: (1px outset #808080)]
@@ skipping 171 matching lines @@
                     text run at (0,72) width 11: "a "
                     text run at (11,72) width 408: "child of the blue DIV, the yellow DIV should appear inside the "
                     text run at (419,72) width 141: "blue rectangle. Due to"
                     text run at (0,90) width 252: "it being floated to the right and having "
                     text run at (252,90) width 308: "a 10px right margin, the yellow rectange should"
                     text run at (0,108) width 112: "have a 10px blue "
                     text run at (112,108) width 138: "stripe on its right side."
               RenderBlock (anonymous) at (4,1209) size 747x126
                 RenderBR {BR} at (560,0) size 1x18
               RenderBlock {HR} at (4,1343) size 747x2 [border: (1px inset #EEEEEE)]