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diff --git a/webkit/glue/plugins/plugin_group.h b/webkit/glue/plugins/plugin_group.h
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+// 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.
+
+#ifndef WEBKIT_GLUE_PLUGINS_PLUGIN_GROUP_H_
+#define WEBKIT_GLUE_PLUGINS_PLUGIN_GROUP_H_
+#pragma once
+
+#include <map>
+#include <set>
+#include <vector>
+
+#include "base/gtest_prod_util.h"
+#include "base/scoped_ptr.h"
+#include "base/string16.h"
+
+class DictionaryValue;
+class FilePath;
+class Version;
+struct WebPluginInfo;
+
+namespace NPAPI {
+  class PluginList;
+};
+
+template <typename T>
+class linked_ptr;
+
+// Hard-coded definitions of plugin groups.
+struct PluginGroupDefinition {
+  const char* identifier;  // Unique identifier for this group.
+  const char* name;  // Name of this group.
+  const char* name_matcher;  // Substring matcher for the plugin name.
+  const char* version_matcher_low;  // Matchers for the plugin version.
+  const char* version_matcher_high;
+  const char* min_version;  // Minimum secure version.
+  const char* update_url;  // Location of latest secure version.
+};
+
+// A PluginGroup can match a range of versions of a specific plugin (as defined
+// by matching a substring of its name).
+// It contains all WebPluginInfo structs (at least one) matching its definition.
+// In addition, it knows about a security "baseline", i.e. the minimum version
+// of a plugin that is needed in order not to exhibit known security
+// vulnerabilities.
+
+class PluginGroup {
+ public:
+  typedef std::map<std::string, linked_ptr<PluginGroup> > PluginMap;
+
+  // Creates a PluginGroup from a PluginGroupDefinition.
+  static PluginGroup* FromPluginGroupDefinition(
+      const PluginGroupDefinition& definition);
+
+  ~PluginGroup();
+
+  // Creates a PluginGroup from a WebPluginInfo -- when no hard-coded
+  // definition is found.
+  static PluginGroup* FromWebPluginInfo(const WebPluginInfo& wpi);
+
+  // Find a plugin group matching |info| in the list of hardcoded plugins and
+  // returns a copy of it if found, or a new group matching exactly this plugin
+  // otherwise.
+  // The caller should take ownership of the return PluginGroup.
+  static PluginGroup* CopyOrCreatePluginGroup(const WebPluginInfo& info);
+
+  // Configures the set of plugin name patterns for disabling plugins via
+  // enterprise configuration management.
+  static void SetPolicyDisabledPluginPatterns(const std::set<string16>& set);
+
+  // Tests to see if a plugin is on the blacklist using its name as
+  // the lookup key.
+  static bool IsPluginNameDisabledByPolicy(const string16& plugin_name);
+
+  // Tests to see if a plugin is on the blacklist using its path as
+  // the lookup key.
+  static bool IsPluginPathDisabledByPolicy(const FilePath& plugin_path);
+
+  // Find the PluginGroup matching a Plugin in a list of plugin groups. Returns
+  // NULL if no matching PluginGroup is found.
+  static PluginGroup* FindGroupMatchingPlugin(
+      const std::map<std::string, linked_ptr<PluginGroup> >& plugin_groups,
+      const WebPluginInfo& plugin);
+
+  // Creates a copy of this plugin group.
+  PluginGroup* Copy() {
+    return new PluginGroup(group_name_, name_matcher_, version_range_low_str_,
+                           version_range_high_str_, min_version_str_,
+                           update_url_, identifier_);
+  }
+
+  // Returns true if the given plugin matches this group.
+  bool Match(const WebPluginInfo& plugin) const;
+
+  // Adds the given plugin to this group. Provide the position of the
+  // plugin as given by PluginList so we can display its priority.
+  void AddPlugin(const WebPluginInfo& plugin, int position);
+
+  // Enables/disables this group. This enables/disables all plugins in the
+  // group.
+  void Enable(bool enable);
+
+  // Returns whether the plugin group is enabled or not.
+  bool Enabled() const { return enabled_; }
+
+  // Returns a unique identifier for this group, if one is defined, or the empty
+  // string otherwise.
+  const std::string& identifier() const { return identifier_; }
+
+  // Returns this group's name, or the filename without extension if the name
+  // is empty.
+  string16 GetGroupName() const;
+
+  // Returns the description of the highest-priority plug-in in the group.
+  const string16& description() const { return description_; }
+
+  // Returns a DictionaryValue with data to display in the UI.
+  DictionaryValue* GetDataForUI() const;
+
+  // Returns a DictionaryValue with data to save in the preferences.
+  DictionaryValue* GetSummary() const;
+
+  // Returns the update URL.
+  std::string GetUpdateURL() const { return update_url_; }
+
+  // Returns true if the highest-priority plugin in this group has known
+  // security problems.
+  bool IsVulnerable() const;
+
+  // Disables all plugins in this group that are older than the
+  // minimum version.
+  void DisableOutdatedPlugins();
+
+ protected:
+  friend class NPAPI::PluginList;
+  std::vector<FilePath> GetPaths() const;
+
+ private:
+  FRIEND_TEST_ALL_PREFIXES(PluginGroupTest, PluginGroupDefinition);
+
+  static const PluginGroupDefinition* GetPluginGroupDefinitions();
+  static size_t GetPluginGroupDefinitionsSize();
+
+  PluginGroup(const string16& group_name,
+              const string16& name_matcher,
+              const std::string& version_range_low,
+              const std::string& version_range_high,
+              const std::string& min_version,
+              const std::string& update_url,
+              const std::string& identifier);
+
+  Version* CreateVersionFromString(const string16& version_string);
+
+  // Set the description and version for this plugin group from the
+  // given plug-in.
+  void UpdateDescriptionAndVersion(const WebPluginInfo& plugin);
+
+  // Updates the active plugin in the group. The active plugin is the first
+  // enabled one, or if all plugins are disabled, simply the first one.
+  void UpdateActivePlugin(const WebPluginInfo& plugin);
+
+  static std::set<string16>* policy_disabled_plugin_patterns_;
+
+  std::string identifier_;
+  string16 group_name_;
+  string16 name_matcher_;
+  std::string version_range_low_str_;
+  std::string version_range_high_str_;
+  scoped_ptr<Version> version_range_low_;
+  scoped_ptr<Version> version_range_high_;
+  string16 description_;
+  std::string update_url_;
+  bool enabled_;
+  std::string min_version_str_;
+  scoped_ptr<Version> min_version_;
+  scoped_ptr<Version> version_;
+  std::vector<WebPluginInfo> web_plugin_infos_;
+  std::vector<int> web_plugin_positions_;
+
+  DISALLOW_COPY_AND_ASSIGN(PluginGroup);
+};
+
+#endif  // WEBKIT_GLUE_PLUGINS_PLUGIN_GROUP_H_