[Mac][Material] Fixed the lock icon color

chrome/browser/ui/cocoa/location_bar/location_bar_view_mac.mm

 // Copyright 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #import "chrome/browser/ui/cocoa/location_bar/location_bar_view_mac.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #import "base/mac/mac_util.h"
 #include "base/message_loop/message_loop.h"
@@ skipping 710 matching lines @@
   SkColor vector_icon_color = gfx::kPlaceholderColor;
   gfx::VectorIconId vector_icon_id = gfx::VectorIconId::VECTOR_ICON_NONE;
   if (ShouldShowEVBubble()) {
     vector_icon_id = gfx::VectorIconId::LOCATION_BAR_HTTPS_VALID;
     vector_icon_color = in_dark_mode
                             ? LocationBarDecoration::kMaterialDarkModeTextColor
                             : gfx::kGoogleGreen700;
   } else {
     vector_icon_id = omnibox_view_->GetVectorIcon();
     if (in_dark_mode) {
-      vector_icon_color = SK_ColorWHITE;
+      vector_icon_color = LocationBarDecoration::kMaterialDarkModeTextColor;
     } else {
       security_state::SecurityStateModel::SecurityLevel security_level =
           GetToolbarModel()->GetSecurityLevel(false);
       if (security_level == security_state::SecurityStateModel::NONE) {
         vector_icon_color = OmniboxViewMac::BaseTextColorSkia(in_dark_mode);
       } else {
         NSColor* sRGBColor =
             OmniboxViewMac::GetSecureTextColor(security_level, in_dark_mode);
         NSColor* deviceColor =
             [sRGBColor colorUsingColorSpace:[NSColorSpace deviceRGBColorSpace]];
@@ skipping 227 matching lines @@
 
   return zoom_decoration_->UpdateIfNecessary(
       zoom::ZoomController::FromWebContents(web_contents), default_zoom_changed,
       IsLocationBarDark());
 }
 
 void LocationBarViewMac::OnDefaultZoomLevelChanged() {
   if (UpdateZoomDecoration(/*default_zoom_changed=*/true))
     OnDecorationsChanged();
 }