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

chrome/browser/ui/views/constrained_window_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/constrained_window_views.h"
 
 #include <algorithm>
 
 #include "chrome/browser/themes/theme_properties.h"
 #include "chrome/browser/ui/browser_finder.h"
@@ skipping 305 matching lines @@
 
   DISALLOW_COPY_AND_ASSIGN(ConstrainedWindowFrameView);
 };
 
 const gfx::Font* ConstrainedWindowFrameView::title_font_ = NULL;
 
 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;
 // 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 would never shrink below 16 px on a side, if there was one.
 const int kIconMinimumSize = 16;
@@ skipping 313 matching lines @@
   }
 #if defined(USE_ASH)
   ash::CustomFrameViewAsh* frame = new ash::CustomFrameViewAsh(widget);
   // Always use "active" look.
   frame->SetInactiveRenderingDisabled(true);
   return frame;
 #endif
   return new ConstrainedWindowFrameView(widget,
                                         browser_context->IsOffTheRecord());
 }