MacViews: Use bullets for displaying obscured text.

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 a16d06351ea3d8770e2d3b3ae0e6482bb200d594..1e58742b51c8a4cf8322378d9eccdb9ea8e43ef2 100644
--- a/ui/gfx/render_text.h
+++ b/ui/gfx/render_text.h
@@ -209,6 +209,16 @@ void ApplyRenderParams(const FontRenderParams& params,
 // for rendering and translation between logical and visual data.
 class GFX_EXPORT RenderText {
  public:
+// The character used for displaying obscured text.
+// TODO(benrg): GTK uses the first of U+25CF, U+2022, U+2731, U+273A, '*'
+// that's available in the font (find_invisible_char() in gtkentry.c).
+// Use a bullet character on Mac.
+#if defined(OS_MACOSX)
+  static constexpr base::char16 kPasswordReplacementChar = 0x2022;
+#else
+  static constexpr base::char16 kPasswordReplacementChar = '*';
+#endif
+
   virtual ~RenderText();
 
   // Creates a platform-specific or cross-platform RenderText instance.