Removed unused TrayItemMore::ReplaceIcon().

ash/common/system/tray/tray_item_more.h

Index: ash/common/system/tray/tray_item_more.h
diff --git a/ash/common/system/tray/tray_item_more.h b/ash/common/system/tray/tray_item_more.h
index 918d3c38fe5b64ecdf80d73af2de2d26589d837b..04063c686790c72c794f2781e52c3094494cabb9 100644
--- a/ash/common/system/tray/tray_item_more.h
+++ b/ash/common/system/tray/tray_item_more.h
@@ -31,12 +31,6 @@ class TrayItemMore : public ActionableView {
   void SetImage(const gfx::ImageSkia& image_skia);
   void SetAccessibleName(const base::string16& name);
 
- protected:
-  // Replaces the default icon (on the left of the label), and allows a custom
-  // view to be placed there. Once the default icon is replaced, |SetImage|
-  // should never be called.
-  void ReplaceIcon(views::View* view);
-
  private:
   // Overridden from ActionableView.
   bool PerformAction(const ui::Event& event) override;