[Autofill] Tweak credit card signin promo visually.

chrome/browser/ui/views/autofill/autofill_popup_base_view.h

Index: chrome/browser/ui/views/autofill/autofill_popup_base_view.h
diff --git a/chrome/browser/ui/views/autofill/autofill_popup_base_view.h b/chrome/browser/ui/views/autofill/autofill_popup_base_view.h
index 1e636c5115d46051f10aed237b90a521f7ede15b..a5456fabad1dcd798a56023572a0ea3819468568 100644
--- a/chrome/browser/ui/views/autofill/autofill_popup_base_view.h
+++ b/chrome/browser/ui/views/autofill/autofill_popup_base_view.h
@@ -28,14 +28,6 @@ namespace autofill {
 class AutofillPopupBaseView : public views::WidgetDelegateView,
                               public views::WidgetFocusChangeListener,
                               public views::WidgetObserver {
- public:
-  static const SkColor kBorderColor;
-  static const SkColor kHoveredBackgroundColor;
-  static const SkColor kItemTextColor;
-  static const SkColor kPopupBackground;
-  static const SkColor kValueTextColor;
-  static const SkColor kWarningTextColor;
-
  protected:
   explicit AutofillPopupBaseView(AutofillPopupViewDelegate* delegate,
                                  views::Widget* parent_widget);