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

ui/views/corewm/tooltip_aura.cc

 // Copyright 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/corewm/tooltip_aura.h"
 
 #include "base/command_line.h"
 #include "base/strings/string_split.h"
 #include "ui/aura/root_window.h"
 #include "ui/base/resource/resource_bundle.h"
@@ skipping 12 matching lines @@
 // Max visual tooltip width. If a tooltip is greater than this width, it will
 // be wrapped.
 const int kTooltipMaxWidthPixels = 400;
 
 const size_t kMaxLines = 10;
 
 // TODO(derat): This padding is needed on Chrome OS devices but seems excessive
 // when running the same binary on a Linux workstation; presumably there's a
 // difference in font metrics.  Rationalize this.
 const int kTooltipVerticalPadding = 2;
-const int kTooltipTimeoutMs = 500;
 
 // FIXME: get cursor offset from actual cursor size.
 const int kCursorOffsetX = 10;
 const int kCursorOffsetY = 15;
 
 // Creates a widget of type TYPE_TOOLTIP
 views::Widget* CreateTooltipWidget(aura::Window* tooltip_window) {
   views::Widget* widget = new views::Widget;
   views::Widget::InitParams params;
   // For aura, since we set the type to TYPE_TOOLTIP, the widget will get
@@ skipping 225 matching lines @@
 }
 
 void TooltipAura::OnWidgetDestroying(views::Widget* widget) {
   DCHECK_EQ(widget_, widget);
   widget_ = NULL;
   tooltip_window_ = NULL;
 }
 
 }  // namespace corewm
 }  // namespace views