Implemented a policy to match the ClearSiteDataOnExit pref.

chrome/browser/ui/cocoa/options/content_settings_dialog_controller.mm

 // Copyright (c) 2010 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 "chrome/browser/ui/cocoa/options/content_settings_dialog_controller.h"
 
 #import <Cocoa/Cocoa.h>
 
 #include "base/command_line.h"
 #include "base/mac/mac_util.h"
@@ skipping 288 matching lines @@
   ContentSettingsDialogControllerInternal::PrefObserverDisabler
       disabler(observer_.get());
   settingsMap->SetBlockThirdPartyCookies(value);
 }
 
 - (BOOL)blockThirdPartyCookiesManaged {
   HostContentSettingsMap* settingsMap = profile_->GetHostContentSettingsMap();
   return settingsMap->IsBlockThirdPartyCookiesManaged();
 }
 
+- (BOOL)clearSiteDataOnExitManaged {
+  return clearSiteDataOnExit_.IsManaged();
+}
+
 - (BOOL)clearSiteDataOnExit {
   return clearSiteDataOnExit_.GetValue();
 }
 
 - (void)setClearSiteDataOnExit:(BOOL)value {
   ContentSettingsDialogControllerInternal::PrefObserverDisabler
       disabler(observer_.get());
   clearSiteDataOnExit_.SetValue(value);
 }
 
@@ skipping 264 matching lines @@
       return kGeolocationAskIndex;
   }
 }
 
 // Callback when preferences are changed. |prefName| is the name of the
 // pref that has changed and should not be NULL.
 - (void)prefChanged:(const std::string&)prefName {
   if (prefName == prefs::kClearSiteDataOnExit) {
     [self willChangeValueForKey:@"clearSiteDataOnExit"];
     [self didChangeValueForKey:@"clearSiteDataOnExit"];
+    [self willChangeValueForKey:@"clearSiteDataOnExitManaged"];
+    [self didChangeValueForKey:@"clearSiteDataOnExitManaged"];
   }
   if (prefName == prefs::kBlockThirdPartyCookies) {
     [self willChangeValueForKey:@"blockThirdPartyCookies"];
     [self didChangeValueForKey:@"blockThirdPartyCookies"];
     [self willChangeValueForKey:@"blockThirdPartyCookiesManaged"];
     [self didChangeValueForKey:@"blockThirdPartyCookiesManaged"];
   }
   if (prefName == prefs::kBlockNonsandboxedPlugins) {
     [self willChangeValueForKey:@"pluginsEnabledIndex"];
     [self didChangeValueForKey:@"pluginsEnabledIndex"];
@@ skipping 34 matching lines @@
     [self didChangeValueForKey:@"notificationsSettingIndex"];
   }
 }
 
 - (void)contentSettingsChanged:(ContentSettingsDetails*)details {
   [self prefChanged:prefs::kBlockNonsandboxedPlugins];
   [self prefChanged:prefs::kDefaultContentSettings];
 }
 
 @end