Enable lock even when no password hash is present.

chrome/browser/ui/cocoa/profiles/profile_chooser_controller.mm

 // Copyright 2014 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.
 
 #import <Cocoa/Cocoa.h>
 
 #import "chrome/browser/ui/cocoa/profiles/profile_chooser_controller.h"
 
 #include "base/mac/bundle_locations.h"
 #include "base/prefs/pref_service.h"
@@ skipping 1704 matching lines @@
                                kBlueButtonHeight + kSmallVerticalSpacing);
   base::scoped_nsobject<NSView> container([[NSView alloc] initWithFrame:rect]);
 
   if (displayLock) {
     NSButton* lockButton =
         [self hoverButtonWithRect:viewRect
                              text:l10n_util::GetNSString(
                                   IDS_PROFILES_PROFILE_SIGNOUT_BUTTON)
                   imageResourceId:IDR_ICON_PROFILES_MENU_LOCK
                            action:@selector(lockProfile:)];
-    if (!chrome::LocalAuthCredentialsExist(browser_->profile()))
-      [lockButton setEnabled:NO];
     [container addSubview:lockButton];
     viewRect.origin.y = NSMaxY([lockButton frame]);
 
     NSBox* separator = [self horizontalSeparatorWithFrame:viewRect];
     [container addSubview:separator];
     viewRect.origin.y = NSMaxY([separator frame]);
   }
 
   if ([self shouldShowGoIncognito]) {
     NSButton* goIncognitoButton =
@@ skipping 442 matching lines @@
 }
 
 - (bool)shouldShowGoIncognito {
   bool incognitoAvailable =
       IncognitoModePrefs::GetAvailability(browser_->profile()->GetPrefs()) !=
           IncognitoModePrefs::DISABLED;
   return incognitoAvailable && !browser_->profile()->IsGuestSession();
 }
 
 @end