Move gfx::ElideText functionality to RenderText.

ui/gfx/text_constants.h

Index: ui/gfx/text_constants.h
diff --git a/ui/gfx/text_constants.h b/ui/gfx/text_constants.h
index 47c91cf5f1454f26d308b99a82756c1d735d71d0..82f2a3b7061386b425c825480db256fe8c9ca446 100644
--- a/ui/gfx/text_constants.h
+++ b/ui/gfx/text_constants.h
@@ -44,7 +44,8 @@ enum TextStyle {
 
 // Elision behaviors of text that exceeds constrained dimensions.
 enum ElideBehavior {
-  TRUNCATE = 0, // Do not elide or fade; the text may be truncated at the end.
+  NO_ELIDE = 0, // Do not modify the text, it may overflow its available bounds.
+  TRUNCATE,     // Do not elide or fade, just truncate at the end of the string.
   ELIDE_HEAD,   // Add an ellipsis at the start of the string.
   ELIDE_MIDDLE, // Add an ellipsis in the middle of the string.
   ELIDE_TAIL,   // Add an ellipsis at the end of the string.