[Material][Mac] Set Incognito Omnibox Dropdown Icons to White

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

 // Copyright (c) 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.
 
 #include "chrome/browser/ui/cocoa/omnibox/omnibox_popup_view_mac.h"
 
 #include <cmath>
 
 #include "base/mac/mac_util.h"
 #import "base/mac/sdk_forward_declarations.h"
@@ skipping 318 matching lines @@
   [[popup_ animator] setFrame:popup_frame display:YES];
   [NSAnimationContext endGrouping];
 
   if (!animate) {
     // Restore the original animations dictionary.  This does not reinstate any
     // previously running animations.
     [popup_ setAnimations:savedAnimations];
   }
 }
 
-NSImage* OmniboxPopupViewMac::ImageForMatch(const AutocompleteMatch& match,
-                                            BOOL ignore_dark_theme) const {
+NSImage* OmniboxPopupViewMac::ImageForMatch(
+    const AutocompleteMatch& match) const {
   gfx::Image image = model_->GetIconIfExtensionMatch(match);
   if (!image.IsEmpty())
     return image.AsNSImage();
 
   if (!ui::MaterialDesignController::IsModeMaterial()) {
     const int resource_id = model_->IsStarredMatch(match)
                                 ? IDR_OMNIBOX_STAR
                                 : AutocompleteMatch::TypeToIcon(match.type);
     return OmniboxViewMac::ImageForResource(resource_id);
   }
-  bool is_dark_mode = !ignore_dark_theme && [matrix_ hasDarkTheme];
+  bool is_dark_mode = [matrix_ hasDarkTheme];
   const SkColor icon_color =
       is_dark_mode ? SkColorSetA(SK_ColorWHITE, 0xCC) : gfx::kChromeIconGrey;
   const gfx::VectorIconId vector_icon_id =
       model_->IsStarredMatch(match)
           ? gfx::VectorIconId::LOCATION_BAR_STAR
           : AutocompleteMatch::TypeToVectorIcon(match.type);
   const int kIconSize = 16;
   return NSImageFromImageSkia(
       gfx::CreateVectorIcon(vector_icon_id, kIconSize, icon_color));
 }
 
 void OmniboxPopupViewMac::OpenURLForRow(size_t row,
                                         WindowOpenDisposition disposition) {
   DCHECK_LT(row, GetResult().size());
   omnibox_view_->OpenMatch(GetResult().match_at(row), disposition, GURL(),
                            base::string16(), row);
 }