Supports the invisible underline for native input fields.

ui/gfx/render_text.cc

Index: ui/gfx/render_text.cc
diff --git a/ui/gfx/render_text.cc b/ui/gfx/render_text.cc
index c3a4f00e0fd14524e3ad0247c4efb3085a34ee1d..bdea9425f5299799acb1a379d5fb16c8e34b1bfc 100644
--- a/ui/gfx/render_text.cc
+++ b/ui/gfx/render_text.cc
@@ -683,10 +683,6 @@ void RenderText::SelectWord() {
   MoveCursorTo(reversed ? selection_min : selection_max, true);
 }
 
-const Range& RenderText::GetCompositionRange() const {
-  return composition_range_;
-}
-
 void RenderText::SetCompositionRange(const Range& composition_range) {
   CHECK(!composition_range.IsValid() ||
         Range(0, text_.length()).Contains(composition_range));