Remove unused usage of Typesetter::NATIVE

This CL is basically removign dead code.

There is an old bug still going on to remove the NATIVE typesetter on
MAC.

CC=​benck@google.com
R=tapted@chromium.org

Bug: 889152, 454835
Change-Id: If1e2814a22aced9030b914b6c1ab60b2f4bf39eb
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1645143
Commit-Queue: Etienne Bergeron <etienneb@chromium.org>
Reviewed-by: Alexei Svitkine <asvitkine@chromium.org>
Reviewed-by: Trent Apted <tapted@chromium.org>
Cr-Commit-Position: refs/heads/master@{#666449}

ui/gfx/text_elider.cc

@@ -788,19 +788,6 @@ int ElideRectangleText(const base::string16& input,
                               Typesetter::HARFBUZZ, lines);
 }
 
-#if defined(OS_MACOSX)
-int ElideRectangleTextForNativeUi(const base::string16& input,
-                                  const FontList& font_list,
-                                  float available_pixel_width,
-                                  int available_pixel_height,
-                                  WordWrapBehavior wrap_behavior,
-                                  std::vector<base::string16>* lines) {
-  return RectangleText::Elide(input, font_list, available_pixel_width,
-                              available_pixel_height, wrap_behavior,
-                              Typesetter::NATIVE, lines);
-}
-#endif
-
 base::string16 TruncateString(const base::string16& string,
                               size_t length,
                               BreakType break_type) {

ui/gfx/text_elider.h

@@ -141,17 +141,6 @@ GFX_EXPORT int ElideRectangleText(const base::string16& text,
                                   WordWrapBehavior wrap_behavior,
                                   std::vector<base::string16>* lines);
 
-#if defined(OS_MACOSX)
-// As above, but uses the native platform typesetter (CoreText on Mac).
-GFX_EXPORT int ElideRectangleTextForNativeUi(
-    const base::string16& input,
-    const FontList& font_list,
-    float available_pixel_width,
-    int available_pixel_height,
-    WordWrapBehavior wrap_behavior,
-    std::vector<base::string16>* lines);
-#endif  // OS_MACOSX
-
 // Truncates |string| to |length| characters. This breaks the string according
 // to the specified |break_type|, which must be either WORD_BREAK or
 // CHARACTER_BREAK, and adds the horizontal ellipsis character (unicode