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

ui/views/touchui/touch_editing_menu.cc

 // 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.
 
 #include "ui/views/touchui/touch_editing_menu.h"
 
 #include "base/strings/utf_string_conversions.h"
 #include "grit/ui_strings.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/base/resource/resource_bundle.h"
@@ skipping 11 matching lines @@
 namespace {
 
 const int kMenuCommands[] = {IDS_APP_CUT,
                              IDS_APP_COPY,
                              IDS_APP_PASTE};
 const int kSpacingBetweenButtons = 2;
 const int kButtonSeparatorColor = SkColorSetARGB(13, 0, 0, 0);
 const int kMenuButtonHeight = 38;
 const int kMenuButtonWidth = 63;
 const int kMenuMargin = 1;
-const SkColor kMenuButtonColorNormal = SkColorSetARGB(102, 255, 255, 255);
-const SkColor kMenuButtonColorHover = SkColorSetARGB(13, 0, 0, 0);
 
 const char* kEllipsesButtonText = "...";
 const int kEllipsesButtonTag = -1;
 }  // namespace
 
 namespace views {
 
 class TouchEditingMenuButtonBorder : public LabelButtonBorder {
  public:
   TouchEditingMenuButtonBorder(Button::ButtonStyle style,
@@ skipping 115 matching lines @@
   int v_border = (kMenuButtonHeight - font.GetHeight()) / 2;
   int h_border = (kMenuButtonWidth - font.GetStringWidth(label)) / 2;
   button->set_border(new TouchEditingMenuButtonBorder(button->style(),
       gfx::Insets(v_border, h_border, v_border, h_border)));
   button->SetFont(font);
   button->set_tag(tag);
   return button;
 }
 
 }  // namespace views