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

chrome/browser/ui/webui/local_discovery/local_discovery_ui_handler.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 "chrome/browser/ui/webui/local_discovery/local_discovery_ui_handler.h"
 
 #include <set>
 
 #include "base/bind.h"
 #include "base/command_line.h"
@@ skipping 41 matching lines @@
 #endif
 
 namespace local_discovery {
 
 namespace {
 const char kPrivetAutomatedClaimURLFormat[] = "%s/confirm?token=%s";
 const int kRegistrationAnnouncementTimeoutSeconds = 5;
 
 const int kInitialRequeryTimeSeconds = 1;
 const int kMaxRequeryTimeSeconds = 2; // Time for last requery
-const int kRequeryExpontentialGrowthBase = 2;
 
 int g_num_visible = 0;
 
 }  // namespace
 
 LocalDiscoveryUIHandler::LocalDiscoveryUIHandler() : is_visible_(false) {
 #if defined(CLOUD_PRINT_CONNECTOR_UI_AVAILABLE)
 #if !defined(GOOGLE_CHROME_BUILD) && defined(OS_WIN)
   // On Windows, we need the PDF plugin which is only guaranteed to exist on
   // Google Chrome builds. Use a command-line switch for Windows non-Google
@@ skipping 564 matching lines @@
 }
 
 void LocalDiscoveryUIHandler::RefreshCloudPrintStatusFromService() {
   if (cloud_print_connector_ui_enabled_)
     CloudPrintProxyServiceFactory::GetForProfile(Profile::FromWebUI(web_ui()))->
         RefreshStatusFromService();
 }
 #endif // cloud print connector option stuff
 
 }  // namespace local_discovery