Update appearance of omnibox focus for MD.

ui/views/controls/textfield/textfield.h

Index: ui/views/controls/textfield/textfield.h
diff --git a/ui/views/controls/textfield/textfield.h b/ui/views/controls/textfield/textfield.h
index 738dec2982f2c0d8bece4aa414b04e3f767f76f8..ef815abf46b4cade36e17c50aeb3f77c345081b2 100644
--- a/ui/views/controls/textfield/textfield.h
+++ b/ui/views/controls/textfield/textfield.h
@@ -206,8 +206,6 @@ class VIEWS_EXPORT Textfield : public View,
   // Performs the action associated with the specified command id.
   void ExecuteCommand(int command_id);
 
-  void SetFocusPainter(std::unique_ptr<Painter> focus_painter);
-
   // Returns whether there is a drag operation originating from the textfield.
   bool HasTextBeingDragged();
 
@@ -410,8 +408,6 @@ class VIEWS_EXPORT Textfield : public View,
   // This will be reported as the "desired size". Defaults to 0.
   int default_width_in_chars_;
 
-  std::unique_ptr<Painter> focus_painter_;
-
   // Flags indicating whether various system colors should be used, and if not,
   // what overriding color values should be used instead.
   bool use_default_text_color_;