Remove icon bg color for message center notifications.

ui/message_center/notification.h

 // Copyright (c) 2013 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 UI_MESSAGE_CENTER_NOTIFICATION_H_
 #define UI_MESSAGE_CENTER_NOTIFICATION_H_
 
 #include <stddef.h>
 
 #include <string>
@@ skipping 153 matching lines @@
   }
 
   int progress() const { return optional_fields_.progress; }
   void set_progress(int progress) { optional_fields_.progress = progress; }
   // End unpacked values.
 
   // Images fetched asynchronously.
   const gfx::Image& icon() const { return icon_; }
   void set_icon(const gfx::Image& icon) { icon_ = icon; }
 
-  // Gets and sets whether to draw a solid background colour behind the
-  // notification's icon. Only applies to the Views implementation.
-  bool draw_icon_background() const { return draw_icon_background_; }
-  void set_draw_icon_background(bool draw) { draw_icon_background_ = draw; }
-
   const gfx::Image& image() const { return optional_fields_.image; }
   void set_image(const gfx::Image& image) { optional_fields_.image = image; }
 
   const gfx::Image& small_image() const { return optional_fields_.small_image; }
   void set_small_image(const gfx::Image& image) {
     optional_fields_.small_image = image;
   }
 
   // Buttons, with icons fetched asynchronously.
   const std::vector<ButtonInfo>& buttons() const {
@@ skipping 72 matching lines @@
   // The type of notification we'd like displayed.
   NotificationType type_;
 
   std::string id_;
   base::string16 title_;
   base::string16 message_;
 
   // Image data for the associated icon, used by Ash when available.
   gfx::Image icon_;
 
-  // True by default; controls whether to draw a solid background colour behind
-  // the |icon_|. Only applies to the Views implementation.
-  bool draw_icon_background_;
-
   // The display string for the source of the notification.  Could be
   // the same as origin_url_, or the name of an extension.
   base::string16 display_source_;
 
  private:
   // The origin URL of the script which requested the notification.
   // Can be empty if requested through a chrome app or extension or if
   // it's a system notification.
   GURL origin_url_;
   NotifierId notifier_id_;
   unsigned serial_number_;
   RichNotificationData optional_fields_;
   bool shown_as_popup_;  // True if this has been shown as a popup.
   bool is_read_;  // True if this has been seen in the message center.
 
   // A proxy object that allows access back to the JavaScript object that
   // represents the notification, for firing events.
   scoped_refptr<NotificationDelegate> delegate_;
 };
 
 }  // namespace message_center
 
 #endif  // UI_MESSAGE_CENTER_NOTIFICATION_H_