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

chrome/browser/chromeos/login/screens/update_screen.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/chromeos/login/screens/update_screen.h"
 
 #include <algorithm>
 
 #include "base/bind.h"
 #include "base/command_line.h"
@@ skipping 23 matching lines @@
 // TODO(nkostylev): Animate progress during each state.
 const int kBeforeUpdateCheckProgress = 7;
 const int kBeforeDownloadProgress = 14;
 const int kBeforeVerifyingProgress = 74;
 const int kBeforeFinalizingProgress = 81;
 const int kProgressComplete = 100;
 
 // Defines what part of update progress does download part takes.
 const int kDownloadProgressIncrement = 60;
 
-// Considering 10px shadow from each side.
-const int kUpdateScreenWidth = 580;
-const int kUpdateScreenHeight = 305;
-
 const char kUpdateDeadlineFile[] = "/tmp/update-check-response-deadline";
 
 // Minimum timestep between two consecutive measurements for the
 // download rate.
 const base::TimeDelta kMinTimeStep = base::TimeDelta::FromSeconds(1);
 
-// Minimum allowed progress between two consecutive ETAs.
-const double kMinProgressStep = 1e-3;
-
 // Smooth factor that is used for the average downloading speed
 // estimation.
 // avg_speed = smooth_factor * cur_speed + (1.0 - smooth_factor) * avg_speed.
 const double kDownloadSpeedSmoothFactor = 0.1;
 
 // Minumum allowed value for the average downloading speed.
 const double kDownloadAverageSpeedDropBound = 1e-8;
 
 // An upper bound for possible downloading time left estimations.
 const double kMaxTimeLeft = 24 * 60 * 60;
@@ skipping 472 matching lines @@
       GetErrorScreen()->SetErrorState(ErrorScreen::ERROR_STATE_PROXY,
                                       std::string());
       break;
     default:
       NOTREACHED();
       break;
   }
 }
 
 }  // namespace chromeos