Implement 'Do Not Track' header

chrome/browser/ui/browser_ui_prefs.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/browser_ui_prefs.h"
 
 #include "chrome/browser/prefs/pref_service.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/common/pref_names.h"
 
@@ skipping 123 matching lines @@
                              PrefService::UNSYNCABLE_PREF);
   prefs->RegisterBooleanPref(prefs::kImportHomepage,
                              true,
                              PrefService::UNSYNCABLE_PREF);
   prefs->RegisterBooleanPref(prefs::kImportSearchEngine,
                              true,
                              PrefService::UNSYNCABLE_PREF);
   prefs->RegisterBooleanPref(prefs::kImportSavedPasswords,
                              true,
                              PrefService::UNSYNCABLE_PREF);
+  prefs->RegisterBooleanPref(prefs::kEnableDoNotTrack,
+                             false,
+                             PrefService::SYNCABLE_PREF);
 
   // Dictionaries to keep track of default tasks in the file browser.
   prefs->RegisterDictionaryPref(prefs::kDefaultTasksByMimeType,
                                 PrefService::SYNCABLE_PREF);
   prefs->RegisterDictionaryPref(prefs::kDefaultTasksBySuffix,
                                 PrefService::SYNCABLE_PREF);
 
   // We need to register the type of these preferences in order to query
   // them even though they're only typically controlled via policy.
   prefs->RegisterBooleanPref(prefs::kPluginsAllowOutdated,
@@ skipping 14 matching lines @@
   window_pref.append(app_name);
   PrefService* prefs = profile->GetPrefs();
   if (!prefs->FindPreference(window_pref.c_str())) {
     prefs->RegisterDictionaryPref(window_pref.c_str(),
                                   PrefService::UNSYNCABLE_PREF);
   }
 }
 
 
 }  // namespace chrome