Adding --disable-plugins-discovery command line switch to not load third-party plugins from common …

webkit/plugins/npapi/plugin_list.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 WEBKIT_PLUGINS_NPAPI_PLUGIN_LIST_H_
 #define WEBKIT_PLUGINS_NPAPI_PLUGIN_LIST_H_
 
 #include <set>
 #include <string>
 #include <utility>
@@ skipping 47 matching lines @@
   // Returns true if we're in debug-plugin-loading mode. This is controlled
   // by a command line switch.
   static bool DebugPluginLoading();
 
   // Returns true if the plugin supports |mime_type|. |mime_type| should be all
   // lower case.
   static bool SupportsType(const webkit::WebPluginInfo& plugin,
                            const std::string& mime_type,
                            bool allow_wildcard);
 
+  // Disables discovery of third_party plugins in standard places next time
+  // plugins are loaded.
+  void DisablePluginsDiscovery();
+
   // Cause the plugin list to refresh next time they are accessed, regardless
   // of whether they are already loaded.
   void RefreshPlugins();
 
   // Add/Remove an extra plugin to load when we actually do the loading.  Must
   // be called before the plugins have been loaded.
   void AddExtraPluginPath(const base::FilePath& plugin_path);
   void RemoveExtraPluginPath(const base::FilePath& plugin_path);
 
   // Same as above, but specifies a directory in which to search for plugins.
@@ skipping 199 matching lines @@
   // A list holding all plug-ins.
   std::vector<webkit::WebPluginInfo> plugins_list_;
 
   // Callback that is invoked whenever the PluginList will reload the plugins.
   base::Closure will_load_plugins_callback_;
 
   // Need synchronization for the above members since this object can be
   // accessed on multiple threads.
   base::Lock lock_;
 
+  // Flag indicating whether third_party plugins will be searched for
+  // in common places.
+  bool plugins_discovery_disabled_;
+
   DISALLOW_COPY_AND_ASSIGN(PluginList);
 };
 
 }  // namespace npapi
 }  // namespace webkit
 
 #endif  // WEBKIT_PLUGINS_NPAPI_PLUGIN_LIST_H_