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

chrome/browser/ui/views/bookmarks/bookmark_bar_view.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/bookmarks/bookmark_bar_view.h"
 
 #include <algorithm>
 #include <limits>
 #include <set>
 #include <vector>
@@ skipping 92 matching lines @@
 
 // Padding between buttons.
 static const int kButtonPadding = 0;
 
 // Icon to display when one isn't found for the page.
 static gfx::ImageSkia* kDefaultFavicon = NULL;
 
 // Icon used for folders.
 static gfx::ImageSkia* kFolderIcon = NULL;
 
-// Offset for where the menu is shown relative to the bottom of the
-// BookmarkBarView.
-static const int kMenuOffset = 3;
-
 // Color of the drop indicator.
 static const SkColor kDropIndicatorColor = SK_ColorBLACK;
 
 // Width of the drop indicator.
 static const int kDropIndicatorWidth = 2;
 
 // Distance between the bottom of the bar and the separator.
 static const int kSeparatorMargin = 1;
 
 // Width of the separator between the recently bookmarked button and the
@@ skipping 1729 matching lines @@
   DCHECK(apps_page_shortcut_);
   // Only perform layout if required.
   bool visible = chrome::ShouldShowAppsShortcutInBookmarkBar(
       browser_->profile());
   if (apps_page_shortcut_->visible() == visible)
     return;
   apps_page_shortcut_->SetVisible(visible);
   UpdateBookmarksSeparatorVisibility();
   Layout();
 }