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

chrome/browser/chromeos/offline/offline_load_page.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/offline/offline_load_page.h"
 
 #include "ash/shell.h"
 #include "ash/shell_delegate.h"
 #include "ash/system/tray/system_tray_delegate.h"
 #include "base/i18n/rtl.h"
@@ skipping 32 matching lines @@
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/base/webui/jstemplate_builder.h"
 #include "ui/base/webui/web_ui_util.h"
 
 using content::BrowserThread;
 using content::InterstitialPage;
 using content::WebContents;
 
 namespace {
 
-// Maximum time to show a blank page.
-const int kMaxBlankPeriod = 3000;
-
 // A utility function to set the dictionary's value given by |resource_id|.
 void SetString(DictionaryValue* strings, const char* name, int resource_id) {
   strings->SetString(name, l10n_util::GetStringUTF16(resource_id));
 }
 
 }  // namespace
 
 namespace chromeos {
 
 OfflineLoadPage::OfflineLoadPage(WebContents* web_contents,
@@ skipping 99 matching lines @@
   const bool online = type != net::NetworkChangeNotifier::CONNECTION_NONE;
   DVLOG(1) << "ConnectionTypeObserver notification received: state="
            << (online ? "online" : "offline");
   if (online) {
     net::NetworkChangeNotifier::RemoveConnectionTypeObserver(this);
     interstitial_page_->Proceed();
   }
 }
 
 }  // namespace chromeos