Unify selection rect snapping logic

Source/platform/fonts/shaping/HarfBuzzShaper.cpp

 /*
  * Copyright (c) 2012 Google Inc. All rights reserved.
  * Copyright (C) 2013 BlackBerry Limited. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
@@ skipping 1128 matching lines @@
         if (!m_run.rtl())
             currentX += m_harfBuzzRuns[i]->width();
     }
 
     // The position in question might be just after the text.
     if (!foundFromX)
         fromX = 0;
     if (!foundToX)
         toX = m_run.rtl() ? 0 : m_totalWidth;
 
-    if (fromX < toX) {
-        return Font::pixelSnappedSelectionRect(
-            point.x() + fromX, point.x() + toX,
-            point.y(), height);
-    }
-
-    return Font::pixelSnappedSelectionRect(
-        point.x() + toX, point.x() + fromX,
-        point.y(), height);
+    if (fromX < toX)
+        return FloatRect(point.x() + fromX, point.y(), toX - fromX, height);
+    return FloatRect(point.x() + toX, point.y(), fromX - toX, height);
 }
 
 } // namespace blink