[Mac][Material Design] Update Omnibox dropdown on Mac to MD

chrome/browser/ui/cocoa/location_bar/star_decoration.h

 // Copyright (c) 2011 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.
 
 #ifndef CHROME_BROWSER_UI_COCOA_LOCATION_BAR_STAR_DECORATION_H_
 #define CHROME_BROWSER_UI_COCOA_LOCATION_BAR_STAR_DECORATION_H_
 
 #import <Cocoa/Cocoa.h>
 
 #include "base/macros.h"
@@ skipping 13 matching lines @@
 
   // Returns true if the star is lit.
   bool starred() const { return starred_; }
 
   // Implement |LocationBarDecoration|.
   bool AcceptsMousePress() override;
   bool OnMousePressed(NSRect frame, NSPoint location) override;
   NSString* GetToolTip() override;
   NSPoint GetBubblePointInFrame(NSRect frame) override;
 
+ protected:
+  // Overridden from LocationBarDecoration:
+  SkColor GetMaterialIconColor(bool location_bar_is_dark) override;
+  gfx::VectorIconId GetMaterialVectorIconId() override;
+
  private:
   // For bringing up bookmark bar.
   CommandUpdater* command_updater_;  // Weak, owned by Browser.
 
   // The string to show for a tooltip.
   base::scoped_nsobject<NSString> tooltip_;
 
   // Whether the star icon is lit.
   bool starred_;
 
   DISALLOW_COPY_AND_ASSIGN(StarDecoration);
 };
 
 #endif  // CHROME_BROWSER_UI_COCOA_LOCATION_BAR_STAR_DECORATION_H_