Enable NPAPI if policy has plugin policies.

chrome/browser/plugins/plugin_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_PLUGINS_PLUGIN_PREFS_H_
 #define CHROME_BROWSER_PLUGINS_PLUGIN_PREFS_H_
 
 #include <map>
 #include <set>
 #include <vector>
@@ skipping 89 matching lines @@
     std::map<base::FilePath, bool> state_;
   };
 
   ~PluginPrefs() override;
 
   // Called to update one of the policy_xyz patterns below when a
   // preference changes.
   void UpdatePatternsAndNotify(std::set<base::string16>* patterns,
                                const std::string& pref_name);
 
+  // Called to enable NPAPI if kEnableNpapi gets set by policy.
+  void EnableNpapi();
+
   // Allows unit tests to directly set enforced plugin patterns.
   void SetPolicyEnforcedPluginPatterns(
       const std::set<base::string16>& disabled_patterns,
       const std::set<base::string16>& disabled_exception_patterns,
       const std::set<base::string16>& enabled_patterns);
 
   // Callback for after the plugin groups have been loaded.
   void EnablePluginGroupInternal(
       bool enabled,
       const base::string16& group_name,
@@ skipping 33 matching lines @@
 
   // Weak pointer, owned by the profile.
   PrefService* prefs_;
 
   PrefChangeRegistrar registrar_;
 
   DISALLOW_COPY_AND_ASSIGN(PluginPrefs);
 };
 
 #endif  // CHROME_BROWSER_PLUGINS_PLUGIN_PREFS_H_