Turn back spoken feedback setting into a system-wide (non-per-user) preference

chrome/browser/policy/configuration_policy_handler_list_factory.cc

 // Copyright 2013 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/policy/configuration_policy_handler_list_factory.h"
 
 #include "base/basictypes.h"
 #include "base/bind.h"
 #include "base/values.h"
 #include "chrome/browser/extensions/api/messaging/native_messaging_policy_handler.h"
@@ skipping 401 matching lines @@
     base::Value::TYPE_BOOLEAN },
   { key::kSpokenFeedbackEnabled,
     prefs::kSpokenFeedbackEnabled,
     base::Value::TYPE_BOOLEAN },
   { key::kHighContrastEnabled,
     prefs::kHighContrastEnabled,
     base::Value::TYPE_BOOLEAN },
   { key::kDeviceLoginScreenDefaultLargeCursorEnabled,
     NULL,
     base::Value::TYPE_BOOLEAN },
-  { key::kDeviceLoginScreenDefaultSpokenFeedbackEnabled,
-    NULL,
-    base::Value::TYPE_BOOLEAN },

[Mattias Nissler (ping if slow), 2014/01/17 12:37:23]

I don't think removing the policy is a good idea, since that means policy can no
longer set a value for the login screen.

   { key::kDeviceLoginScreenDefaultHighContrastEnabled,
     NULL,
     base::Value::TYPE_BOOLEAN },
   { key::kRebootAfterUpdate,
     prefs::kRebootAfterUpdate,
     base::Value::TYPE_BOOLEAN },
   { key::kAttestationEnabledForUser,
     prefs::kAttestationEnabled,
     base::Value::TYPE_BOOLEAN },
   { key::kChromeOsMultiProfileUserBehavior,
@@ skipping 226 matching lines @@
 
 #if defined(OS_ANDROID)
   handlers->AddHandler(make_scoped_ptr<ConfigurationPolicyHandler>(
       new ManagedBookmarksPolicyHandler()));
 #endif
   return handlers.Pass();
 }
 #endif  // !defined(OS_IOS)
 
 }  // namespace policy