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

chrome/browser/ui/views/notifications/balloon_view_views.cc

 // 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/views/notifications/balloon_view_views.h"
 
 #include <algorithm>
 #include <vector>
 
 #include "base/bind.h"
@@ skipping 56 matching lines @@
 // Size of the drop shadow.  The shadow is provided by BubbleBorder,
 // not this class.
 const int kLeftShadowWidth = 0;
 const int kRightShadowWidth = 0;
 const int kTopShadowWidth = 0;
 const int kBottomShadowWidth = 6;
 
 // Optional animation.
 const bool kAnimateEnabled = true;
 
-// Menu commands
-const int kRevokePermissionCommand = 0;
-
 // Colors
 const SkColor kControlBarBackgroundColor = SkColorSetRGB(245, 245, 245);
 const SkColor kControlBarTextColor = SkColorSetRGB(125, 125, 125);
 const SkColor kControlBarSeparatorLineColor = SkColorSetRGB(180, 180, 180);
 
 }  // namespace
 
 // static
 int BalloonView::GetHorizontalMargin() {
   return kLeftMargin + kRightMargin + kLeftShadowWidth + kRightShadowWidth;
@@ skipping 447 matching lines @@
     return;
   }
 
   // If the renderer process attached to this balloon is disconnected
   // (e.g., because of a crash), we want to close the balloon.
   notification_registrar_.Remove(
       this, chrome::NOTIFICATION_NOTIFY_BALLOON_DISCONNECTED,
       content::Source<Balloon>(balloon_));
   Close(false);
 }