Add SetProminent() to MdTextButton to create blue buttons.

ui/native_theme/native_theme_win.cc

Index: ui/native_theme/native_theme_win.cc
diff --git a/ui/native_theme/native_theme_win.cc b/ui/native_theme/native_theme_win.cc
index 6dc57e9dbc0aa3a53ed107c84153bcb225112d2a..39dc32477e977676b3386baaf41c3130a117c5a5 100644
--- a/ui/native_theme/native_theme_win.cc
+++ b/ui/native_theme/native_theme_win.cc
@@ -473,7 +473,7 @@ SkColor NativeThemeWin::GetSystemColor(ColorId color_id) const {
   const SkColor kButtonBackgroundColor = SkColorSetRGB(0xde, 0xde, 0xde);
   const SkColor kButtonHighlightColor = SkColorSetARGB(200, 255, 255, 255);
   const SkColor kButtonHoverColor = SkColorSetRGB(6, 45, 117);
-  const SkColor kCallToActionColorInvert = gfx::kGoogleBlue300;
+  const SkColor kProminentButtonColorInvert = gfx::kGoogleBlue300;
   // MenuItem:
   const SkColor kMenuSchemeHighlightBackgroundColorInvert =
       SkColorSetRGB(0x30, 0x30, 0x30);
@@ -643,8 +643,8 @@ SkColor NativeThemeWin::GetSystemColor(ColorId color_id) const {
     switch (color_id) {
       case NativeTheme::kColorId_FocusedMenuItemBackgroundColor:
         return kMenuSchemeHighlightBackgroundColorInvert;
-      case NativeTheme::kColorId_CallToActionColor:
-        return kCallToActionColorInvert;
+      case NativeTheme::kColorId_ProminentButtonColor:
+        return kProminentButtonColorInvert;
       default:
         return color_utils::InvertColor(GetAuraColor(color_id, this));
     }