Cleanup: Remove more dead GTK code.

chrome/browser/ui/startup/obsolete_system_infobar_delegate.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/startup/obsolete_system_infobar_delegate.h"
 
 #include "base/cpu.h"
 #include "chrome/browser/infobars/infobar_service.h"
 #include "chrome/common/url_constants.h"
 #include "components/infobars/core/infobar.h"
 #include "content/public/browser/web_contents.h"
 #include "grit/chromium_strings.h"
 #include "grit/generated_resources.h"
 #include "ui/base/l10n/l10n_util.h"
 
 #if defined(OS_MACOSX)
 #include "chrome/browser/mac/obsolete_system.h"
 #endif
 
-#if defined(TOOLKIT_GTK)
-#include <gtk/gtk.h>
-#endif
-
 // static
 void ObsoleteSystemInfoBarDelegate::Create(InfoBarService* infobar_service) {
 #if defined(OS_MACOSX)
   if (!ObsoleteSystemMac::Is32BitObsoleteNowOrSoon() ||
       !ObsoleteSystemMac::Has32BitOnlyCPU()) {
     return;
   }
-#elif defined(TOOLKIT_GTK)
-  // We've deprecated support for Ubuntu Lucid.  Rather than attempting to
-  // determine whether you're using that, we instead key off the GTK version;
-  // this will also deprecate other distributions (including variants of Ubuntu)
-  // that are of a similar age.
-  // Version key:
-  //   RHEL 6:             GTK 2.18
-  //   Debian 6 (Squeeze): GTK 2.20
-  //   Ubuntu Lucid:       GTK 2.20
-  //   openSUSE 12.2       GTK 2.24
-  //   Ubuntu Precise:     GTK 2.24
-  if (!gtk_check_version(2, 24, 0))
-    return;
 #elif defined(OS_WIN)
   // On Windows we no longer support non-SSE2 machines since Chrome 35.
   if (base::CPU().has_sse2())
     return;
 #else
   // No other platforms currently show this infobar.
   return;
 #endif
 
   infobar_service->AddInfoBar(ConfirmInfoBarDelegate::CreateInfoBar(
@@ skipping 33 matching lines @@
           GURL(chrome::kMac32BitDeprecationURL),
 #else
           GURL("http://www.google.com/support/chrome/bin/"
                "answer.py?answer=95411"),
 #endif
           content::Referrer(),
           (disposition == CURRENT_TAB) ? NEW_FOREGROUND_TAB : disposition,
           content::PAGE_TRANSITION_LINK, false));
   return false;
 }