linux and chromeos: Turn on -Wunused-const-variable.

chrome/browser/ui/views/message_center/web_notification_tray.cc

 // Copyright 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.
 
 #include "chrome/browser/ui/views/message_center/web_notification_tray.h"
 
 #include "base/i18n/number_formatting.h"
 #include "base/strings/string16.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/browser_process.h"
@@ skipping 14 matching lines @@
 #include "ui/message_center/message_center_tray.h"
 #include "ui/message_center/message_center_tray_delegate.h"
 #include "ui/message_center/views/message_popup_collection.h"
 #include "ui/views/widget/widget.h"
 
 namespace {
 
 // Tray constants
 const int kScreenEdgePadding = 2;
 
-const int kSystemTrayWidth = 16;
-const int kSystemTrayHeight = 16;
-const int kNumberOfSystemTraySprites = 10;
-
 // Number of pixels the message center is offset from the mouse.
 const int kMouseOffset = 5;
 
 // Menu commands
 const int kToggleQuietMode = 0;
 const int kEnableQuietModeHour = 1;
 const int kEnableQuietModeDay = 2;
 
 gfx::ImageSkia* GetIcon(int unread_count, bool is_quiet_mode) {
   ui::ResourceBundle& rb = ui::ResourceBundle::GetSharedInstance();
@@ skipping 314 matching lines @@
   status_icon_menu_ = menu.get();
   status_icon->SetContextMenu(menu.Pass());
 }
 
 MessageCenterWidgetDelegate*
 WebNotificationTray::GetMessageCenterWidgetDelegateForTest() {
   return message_center_delegate_;
 }
 
 }  // namespace message_center