Remove the WARNING security level.

chrome/browser/ui/cocoa/omnibox/omnibox_view_mac.mm

Index: chrome/browser/ui/cocoa/omnibox/omnibox_view_mac.mm
diff --git a/chrome/browser/ui/cocoa/omnibox/omnibox_view_mac.mm b/chrome/browser/ui/cocoa/omnibox/omnibox_view_mac.mm
index 62821090b35cc488e483bb06132d7f62d88b76b2..c9f13a8b92d678cde2bb99e50ebe412721e7a702 100644
--- a/chrome/browser/ui/cocoa/omnibox/omnibox_view_mac.mm
+++ b/chrome/browser/ui/cocoa/omnibox/omnibox_view_mac.mm
@@ -109,11 +109,6 @@ NSColor* SecureSchemeColor(bool in_dark_mode) {
   return in_dark_mode ? skia::SkColorToSRGBNSColor(SK_ColorWHITE)
                       : skia::SkColorToSRGBNSColor(gfx::kGoogleGreen700);
 }
-NSColor* SecurityWarningSchemeColor(bool in_dark_mode) {
-  return in_dark_mode
-      ? skia::SkColorToSRGBNSColor(SkColorSetA(SK_ColorWHITE, 0x7F))
-      : skia::SkColorToSRGBNSColor(gfx::kGoogleYellow700);
-}
 NSColor* SecurityErrorSchemeColor(bool in_dark_mode) {
   if (!ui::MaterialDesignController::IsModeMaterial()) {
     return ColorWithRGBBytes(0xa2, 0x00, 0x00);
@@ -195,12 +190,9 @@ NSColor* OmniboxViewMac::GetSecureTextColor(
     return SecureSchemeColor(in_dark_mode);
   }
 
-  if (security_level == security_state::SecurityStateModel::SECURITY_ERROR)
-    return SecurityErrorSchemeColor(in_dark_mode);
-
-  DCHECK_EQ(security_state::SecurityStateModel::SECURITY_WARNING,
+  DCHECK_EQ(security_state::SecurityStateModel::SECURITY_ERROR,
             security_level);
-  return SecurityWarningSchemeColor(in_dark_mode);
+  return SecurityErrorSchemeColor(in_dark_mode);
 }
 
 OmniboxViewMac::OmniboxViewMac(OmniboxEditController* controller,