Introduce incognito preference settings.

chrome/browser/extensions/extension_proxy_api.cc

-// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Copyright (c) 2011 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/extensions/extension_proxy_api.h"
 
 #include "base/string_util.h"
 #include "base/stringprintf.h"
 #include "base/values.h"
 #include "chrome/browser/prefs/proxy_prefs.h"
 #include "chrome/browser/profiles/profile.h"
@@ skipping 152 matching lines @@
     }
   }
 
   ApplyPreference(prefs::kProxyServer, Value::CreateStringValue(proxy_pref));
   return true;
 }
 
 void UseCustomProxySettingsFunction::ApplyPreference(const char* pref_path,
                                                      Value* pref_value) {
   profile()->GetExtensionService()->extension_prefs()
-      ->SetExtensionControlledPref(extension_id(), pref_path, pref_value);
+      ->SetExtensionControlledPref(extension_id(), pref_path, false,
+                                   pref_value);
 }