Don't store empty values for autofill

chrome/browser/browser.cc

 // Copyright (c) 2006-2008 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/browser.h"
 
 #include "base/command_line.h"
 #include "base/idle_timer.h"
 #include "base/logging.h"
 #include "base/string_util.h"
@@ skipping 1002 matching lines @@
 }
 
 // static
 void Browser::RegisterUserPrefs(PrefService* prefs) {
   prefs->RegisterStringPref(prefs::kHomePage, L"chrome-internal:");
   prefs->RegisterBooleanPref(prefs::kHomePageIsNewTabPage, true);
   prefs->RegisterIntegerPref(prefs::kCookieBehavior,
                              net::CookiePolicy::ALLOW_ALL_COOKIES);
   prefs->RegisterBooleanPref(prefs::kShowHomeButton, false);
   prefs->RegisterStringPref(prefs::kRecentlySelectedEncoding, L"");
-  // TODO(peterson): bug #3870 move this to the AutofillManager once it is
-  //                 checked-in.
-  prefs->RegisterBooleanPref(prefs::kFormAutofillEnabled, true);
   prefs->RegisterBooleanPref(prefs::kDeleteBrowsingHistory, true);
   prefs->RegisterBooleanPref(prefs::kDeleteDownloadHistory, true);
   prefs->RegisterBooleanPref(prefs::kDeleteCache, true);
   prefs->RegisterBooleanPref(prefs::kDeleteCookies, true);
   prefs->RegisterBooleanPref(prefs::kDeletePasswords, false);
   prefs->RegisterBooleanPref(prefs::kDeleteFormData, true);
   prefs->RegisterIntegerPref(prefs::kDeleteTimePeriod, 0);
 }
 
 // static
@@ skipping 1418 matching lines @@
 
   // We need to register the window position pref.
   std::wstring window_pref(prefs::kBrowserWindowPlacement);
   window_pref.append(L"_");
   window_pref.append(app_name);
   PrefService* prefs = g_browser_process->local_state();
   DCHECK(prefs);
 
   prefs->RegisterDictionaryPref(window_pref.c_str());
 }