Make extension file URL access opt-in.

chrome/browser/extensions/extension_prefs.h

 // Copyright (c) 2011 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 189 matching lines @@
 
   // Returns true if the user enabled this extension to be loaded in incognito
   // mode.
   bool IsIncognitoEnabled(const std::string& extension_id);
   void SetIsIncognitoEnabled(const std::string& extension_id, bool enabled);
 
   // Returns true if the user has chosen to allow this extension to inject
   // scripts into pages with file URLs.
   bool AllowFileAccess(const std::string& extension_id);
   void SetAllowFileAccess(const std::string& extension_id, bool allow);
-  bool HasAllowFileAccessSetting(const std::string& extension_id) const;
 
   // Get the launch type preference.  If no preference is set, return
   // |default_pref_value|.
   LaunchType GetLaunchType(const std::string& extension_id,
                            LaunchType default_pref_value);
 
   void SetLaunchType(const std::string& extension_id, LaunchType launch_type);
 
   // Find the right launch container based on the launch type.
   // If |extension|'s prefs do not have a launch type set, then
@@ skipping 259 matching lines @@
 
   scoped_refptr<ExtensionContentSettingsStore> content_settings_store_;
 
   // The URLs of all of the toolstrips.
   URLList shelf_order_;
 
   DISALLOW_COPY_AND_ASSIGN(ExtensionPrefs);
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_PREFS_H_