Remove obsolete plugin state handling code.

chrome/browser/plugins/plugin_prefs.h

Index: chrome/browser/plugins/plugin_prefs.h
diff --git a/chrome/browser/plugins/plugin_prefs.h b/chrome/browser/plugins/plugin_prefs.h
index 05c8159d48fcc981a916a87b1de93e1901613705..9f470193b6e44cd310538100cea59b305b58dbe5 100644
--- a/chrome/browser/plugins/plugin_prefs.h
+++ b/chrome/browser/plugins/plugin_prefs.h
@@ -20,10 +20,6 @@
 
 class Profile;
 
-namespace base {
-class ListValue;
-}
-
 namespace content {
 struct WebPluginInfo;
 }
@@ -55,17 +51,6 @@ class PluginPrefs : public RefcountedKeyedService {
   // This method should only be called on the UI thread.
   void SetPrefs(PrefService* prefs);
 
-  // Enable or disable a plugin group.
-  void EnablePluginGroup(bool enable, const base::string16& group_name);
-
-  // Enables or disables a specific plugin file, if possible.
-  // If the plugin state can't be changed (because of a policy for example)
-  // then enabling/disabling the plugin is ignored and |callback| is run
-  // with 'false' passed to it. Otherwise the plugin state is changed
-  // and |callback| is run with 'true' passed to it.
-  void EnablePlugin(bool enable, const base::FilePath& file_path,
-                    const base::Callback<void(bool)>& callback);
-
   // Returns whether there is a policy enabling or disabling plugins of the
   // given name.
   PolicyStatus PolicyStatusForPlugin(const base::string16& name) const;
@@ -81,79 +66,25 @@ class PluginPrefs : public RefcountedKeyedService {
  private:
   friend class base::RefCountedThreadSafe<PluginPrefs>;
   friend class PluginPrefsTest;
-
-  // PluginState stores a mapping from plugin path to enable/disable state. We
-  // don't simply use a std::map, because we would like to keep the state of
-  // some plugins in sync with each other.
-  class PluginState {
-   public:
-    PluginState();
-    ~PluginState();
-
-    // Returns whether |plugin| is found. If |plugin| cannot be found,
-    // |*enabled| won't be touched.
-    bool Get(const base::FilePath& plugin, bool* enabled) const;
-    void Set(const base::FilePath& plugin, bool enabled);
-
-   private:
-    base::FilePath ConvertMapKey(const base::FilePath& plugin) const;
-
-    std::map<base::FilePath, bool> state_;
-  };
+  friend class PrintPreviewDialogControllerBrowserTest;
 
   ~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);
-
   // Callback for changes to the AlwaysOpenPdfExternally policy.
   void UpdatePdfPolicy(const std::string& pref_name);
 
-  // Allows unit tests to directly set enforced plugin patterns.
-  void SetPolicyEnforcedPluginPatternsForTests(
-      const std::set<base::string16>& disabled_patterns,
-      const std::set<base::string16>& disabled_exception_patterns,
-      const std::set<base::string16>& enabled_patterns);
-
   // Allows unit tests to directly set the AlwaysOpenPdfExternally pref.
   void SetAlwaysOpenPdfExternallyForTests(bool always_open_pdf_externally);
 
-  // Callback for after the plugin groups have been loaded.
-  void EnablePluginGroupInternal(
-      bool enabled,
-      const base::string16& group_name,
-      const std::vector<content::WebPluginInfo>& plugins);
-  void EnablePluginInternal(
-      bool enabled,
-      const base::FilePath& path,
-      PluginFinder* plugin_finder,
-      const base::Callback<void(bool)>& callback,
-      const std::vector<content::WebPluginInfo>& plugins);
-
   // Called on the UI thread with the plugin data to save the preferences.
   void OnUpdatePreferences(const std::vector<content::WebPluginInfo>& plugins);
 
   // Sends the notification that plugin data has changed.
   void NotifyPluginStatusChanged();
 
-  static void ListValueToStringSet(const base::ListValue* src,
-                                   std::set<base::string16>* dest);
-
-  // Checks if |name| matches any of the patterns in |pattern_set|.
-  static bool IsStringMatchedInSet(const base::string16& name,
-                                   const std::set<base::string16>& pattern_set);
-
   // Guards access to the following data structures.
   mutable base::Lock lock_;
 
-  PluginState plugin_state_;
-  std::map<base::string16, bool> plugin_group_state_;
-
-  std::set<base::string16> policy_disabled_plugin_patterns_;
-  std::set<base::string16> policy_disabled_plugin_exception_patterns_;
-  std::set<base::string16> policy_enabled_plugin_patterns_;
   bool always_open_pdf_externally_;
 
   // Weak pointer, owns us. Only used as a notification source.