Reintroduce password support to NativeTextfieldViews

ui/gfx/render_text.h

Index: ui/gfx/render_text.h
diff --git a/ui/gfx/render_text.h b/ui/gfx/render_text.h
index da3607d9e11f8ed7109d2033f28903f7171b9d19..4b29f8f8ef77d3fc1ffc571237d9742e94d6a4a4 100644
--- a/ui/gfx/render_text.h
+++ b/ui/gfx/render_text.h
@@ -42,6 +42,7 @@ struct UI_EXPORT StyleRange {
   SkColor foreground;
   bool strike;
   bool underline;
+  bool password;  // make all glyphs look the same (password mode)
   ui::Range range;
 };
 
@@ -73,6 +74,10 @@ class UI_EXPORT RenderText {
   const string16& text() const { return text_; }
   void SetText(const string16& text);
 
+  // Like text() except that regions with the password property set are
+  // replaced with asterisks or bullets.
+  string16 GetCensoredText() const;
+
   const SelectionModel& selection_model() const { return selection_model_; }
 
   bool cursor_visible() const { return cursor_visible_; }