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

ui/views/window/custom_frame_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 "ui/views/window/custom_frame_view.h"
 
 #include <algorithm>
 
 #include "base/strings/utf_string_conversions.h"
 #include "grit/ui_resources.h"
@@ skipping 20 matching lines @@
 #include "ui/views/widget/native_widget_win.h"
 #endif
 
 namespace views {
 
 namespace {
 
 // The frame border is only visible in restored mode and is hardcoded to 4 px on
 // each side regardless of the system window border size.
 const int kFrameBorderThickness = 4;
-// Various edges of the frame border have a 1 px shadow along their edges; in a
-// few cases we shift elements based on this amount for visual appeal.
-const int kFrameShadowThickness = 1;
-// While resize areas on Windows are normally the same size as the window
-// borders, our top area is shrunk by 1 px to make it easier to move the window
-// around with our thinner top grabbable strip.  (Incidentally, our side and
-// bottom resize areas don't match the frame border thickness either -- they
-// span the whole nonclient area, so there's no "dead zone" for the mouse.)
-const int kTopResizeAdjust = 1;
 // In the window corners, the resize areas don't actually expand bigger, but the
 // 16 px at the end of each edge triggers diagonal resizing.
 const int kResizeAreaCornerSize = 16;
 // The titlebar never shrinks too short to show the caption button plus some
 // padding below it.
 const int kCaptionButtonHeightWithPadding = 19;
 // The titlebar has a 2 px 3D edge along the top and bottom.
 const int kTitlebarTopAndBottomEdgeThickness = 2;
 // The icon is inset 2 px from the left frame border.
 const int kIconLeftSpacing = 2;
@@ skipping 504 matching lines @@
                    rb.GetImageNamed(normal_image_id).ToImageSkia());
   button->SetImage(CustomButton::STATE_HOVERED,
                    rb.GetImageNamed(hot_image_id).ToImageSkia());
   button->SetImage(CustomButton::STATE_PRESSED,
                    rb.GetImageNamed(pushed_image_id).ToImageSkia());
   AddChildView(button);
   return button;
 }
 
 }  // namespace views