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diff --git a/webkit/glue/plugins/plugin_lib.h b/webkit/glue/plugins/plugin_lib.h
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+++ b/webkit/glue/plugins/plugin_lib.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_LIB_H_
+#define WEBKIT_GLUE_PLUGINS_PLUGIN_LIB_H_
+
+#include <string>
+#include <vector>
+
+#include "base/basictypes.h"
+#include "base/file_path.h"
+#include "base/native_library.h"
+#include "base/ref_counted.h"
+#include "build/build_config.h"
+#include "webkit/glue/plugins/plugin_list.h"
+#include "webkit/glue/plugins/webplugin.h"
+
+struct WebPluginInfo;
+
+namespace NPAPI {
+
+class PluginInstance;
+
+// A PluginLib is a single NPAPI Plugin Library, and is the lifecycle
+// manager for new PluginInstances.
+class PluginLib : public base::RefCounted<PluginLib> {
+ public:
+  static PluginLib* CreatePluginLib(const FilePath& filename);
+
+  // Creates a WebPluginInfo structure given a plugin's path.  On success
+  // returns true, with the information being put into "info".
+  // Returns false if the library couldn't be found, or if it's not a plugin.
+  static bool ReadWebPluginInfo(const FilePath& filename, WebPluginInfo* info);
+
+#if defined(OS_POSIX) && !defined(OS_MACOSX)
+  // Parse the result of an NP_GetMIMEDescription() call.
+  // This API is only used on Unixes, and is exposed here for testing.
+  static void ParseMIMEDescription(const std::string& description,
+                                   std::vector<WebPluginMimeType>* mime_types);
+#endif
+
+  // Unloads all the loaded plugin libraries and cleans up the plugin map.
+  static void UnloadAllPlugins();
+
+  // Shuts down all loaded plugin instances.
+  static void ShutdownAllPlugins();
+
+  // Get the Plugin's function pointer table.
+  NPPluginFuncs* functions();
+
+  // Creates a new instance of this plugin.
+  PluginInstance* CreateInstance(const std::string& mime_type);
+
+  // Called by the instance when the instance is tearing down.
+  void CloseInstance();
+
+  // Gets information about this plugin and the mime types that it
+  // supports.
+  const WebPluginInfo& plugin_info() { return web_plugin_info_; }
+
+  bool internal() { return internal_; }
+
+  //
+  // NPAPI functions
+  //
+
+  // NPAPI method to initialize a Plugin.
+  // Initialize can be safely called multiple times
+  NPError NP_Initialize();
+
+  // NPAPI method to shutdown a Plugin.
+  void NP_Shutdown(void);
+
+  int instance_count() const { return instance_count_; }
+
+  // Prevents the library code from being unload when Unload() is called (since
+  // some plugins crash if unloaded).
+  void PreventLibraryUnload();
+
+  // protected for testability.
+ protected:
+  friend class base::RefCounted<PluginLib>;
+
+  // Creates a new PluginLib.
+  // |entry_points| is non-NULL for internal plugins.
+  PluginLib(const WebPluginInfo& info,
+            const PluginEntryPoints* entry_points);
+
+  virtual ~PluginLib();
+
+  // Attempts to load the plugin from the library.
+  // Returns true if it is a legitimate plugin, false otherwise
+  bool Load();
+
+  // Unloads the plugin library.
+  void Unload();
+
+  // Shutdown the plugin library.
+  void Shutdown();
+
+ private:
+  bool internal_;  // True for plugins that are built-in into chrome binaries.
+  WebPluginInfo web_plugin_info_;  // Supported mime types, description
+  base::NativeLibrary library_;  // The opened library reference.
+  NPPluginFuncs plugin_funcs_;  // The struct of plugin side functions.
+  bool initialized_;  // Is the plugin initialized?
+  NPSavedData *saved_data_;  // Persisted plugin info for NPAPI.
+  int instance_count_;  // Count of plugins in use.
+  bool skip_unload_;  // True if library_ should not be unloaded.
+
+  // Function pointers to entry points into the plugin.
+  PluginEntryPoints entry_points_;
+
+  DISALLOW_COPY_AND_ASSIGN(PluginLib);
+};
+
+}  // namespace NPAPI
+
+#endif  // WEBKIT_GLUE_PLUGINS_PLUGIN_LIB_H_