Linux: make the "change proxy settings" button able to start several proxy config utilities.

net/proxy/proxy_config_service_linux.cc

 // Copyright (c) 2009 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 "net/proxy/proxy_config_service_linux.h"
 
 #include <gconf/gconf-client.h>
 #include <stdlib.h>
 
 #include "base/logging.h"
@@ skipping 536 matching lines @@
           // Keep a copy of the config for use from this thread for
           // comparison with updated settings when we get notifications.
           reference_config_ = cached_config_;
           reference_config_.set_id(1);  // mark it as valid
         } else {
           gconf_getter_->Release();  // Stop notifications
         }
       }
       break;
 
-    case base::DESKTOP_ENVIRONMENT_KDE:
+    case base::DESKTOP_ENVIRONMENT_KDE3:
+    case base::DESKTOP_ENVIRONMENT_KDE4:
       NOTIMPLEMENTED() << "Bug 17363: obey KDE proxy settings.";
       break;
 
     case base::DESKTOP_ENVIRONMENT_OTHER:
       break;
   }
 
   if (!got_config) {
     // We fall back on environment variables.
     //
@@ skipping 82 matching lines @@
                              new GConfSettingGetterImpl())) {
 }
 
 ProxyConfigServiceLinux::ProxyConfigServiceLinux(
     base::EnvironmentVariableGetter* env_var_getter,
     GConfSettingGetter* gconf_getter)
     : delegate_(new Delegate(env_var_getter, gconf_getter)) {
 }
 
 }  // namespace net