Disable modifying extensions when in managed mode.

chrome/browser/extensions/extension_prefs.h

 // 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.
 
 #ifndef CHROME_BROWSER_EXTENSIONS_EXTENSION_PREFS_H_
 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_PREFS_H_
 #pragma once
 
 #include <set>
 #include <string>
@@ skipping 194 matching lines @@
   std::string GetAppNotificationClientId(const std::string& extension_id) const;
   void SetAppNotificationClientId(const std::string& extension_id,
                                   const std::string& oauth_client_id);
 
   // Whether app notifications are disabled for the given app.
   bool IsAppNotificationDisabled(const std::string& extension_id) const;
   void SetAppNotificationDisabled(const std::string& extension_id, bool value);
 
   // ManagementPolicy::Provider
   // These methods apply admin policy to extensions.
-  virtual std::string GetPolicyProviderName() const OVERRIDE;
+  virtual std::string GetDebugPolicyProviderName() const OVERRIDE;
   virtual bool UserMayLoad(const extensions::Extension* extension,
                            string16* error) const OVERRIDE;
   virtual bool UserMayModifySettings(const extensions::Extension* extension,
                                      string16* error) const OVERRIDE;
   virtual bool MustRemainEnabled(const extensions::Extension* extension,
                                  string16* error) const OVERRIDE;
 
   // Checks if extensions are blacklisted by default, by policy.
   // The ManagementPolicy::Provider methods also take this into account, and
   // should be used instead when the extension ID is known.
@@ skipping 331 matching lines @@
   // Contains all the logic for handling the order for various extension
   // properties.
   scoped_ptr<ExtensionSorting> extension_sorting_;
 
   scoped_refptr<extensions::ContentSettingsStore> content_settings_store_;
 
   DISALLOW_COPY_AND_ASSIGN(ExtensionPrefs);
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_PREFS_H_