Allow Flash (and other plugins) to be installed without restarting the browse...

chrome/browser/plugin_service.h

 // Copyright (c) 2006-2008 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.
 
 // This class responds to requests from renderers for the list of plugins, and
 // also a proxy object for plugin instances.
 
 #ifndef CHROME_BROWSER_PLUGIN_SERVICE_H_
 #define CHROME_BROWSER_PLUGIN_SERVICE_H_
 
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/hash_tables.h"
 #include "base/lock.h"
 #include "base/ref_counted.h"
 #include "base/singleton.h"
+#include "base/waitable_event_watcher.h"
 #include "chrome/browser/browser_process.h"
 #include "webkit/glue/webplugin.h"
 
+#if defined(OS_WIN)
+#include "base/registry.h"
+#endif
+
 namespace IPC {
 class Message;
 }
 
 class MessageLoop;
 class PluginProcessHost;
 class URLRequestContext;
 class ResourceDispatcherHost;
 class ResourceMessageFilter;
 
 // This can be called on the main thread and IO thread.  However it must
 // be created on the main thread.
-class PluginService {
+class PluginService : base::WaitableEventWatcher::Delegate {
  public:
   // Returns the PluginService singleton.
   static PluginService* GetInstance();
 
   // Gets the list of available plugins.
   void GetPlugins(bool refresh, std::vector<WebPluginInfo>* plugins);
 
   // Load all the plugins that should be loaded for the lifetime of the browser
   // (ie, with the LoadOnStartup flag set).
   void LoadChromePlugins(ResourceDispatcherHost* resource_dispatcher_host);
@@ skipping 58 matching lines @@
   }
 
  private:
   friend struct DefaultSingletonTraits<PluginService>;
 
   // Creates the PluginService object, but doesn't actually build the plugin
   // list yet.  It's generated lazily.
   PluginService();
   ~PluginService();
 
+  // base::WaitableEventWatcher::Delegate implementation.
+  void OnWaitableEventSignaled(base::WaitableEvent* waitable_event);
+
   // mapping between plugin path and PluginProcessHost
   typedef base::hash_map<FilePath, PluginProcessHost*> PluginMap;
   PluginMap plugin_hosts_;
 
   // The main thread's message loop.
   MessageLoop* main_message_loop_;
 
   // The IO thread's resource dispatcher host.
   ResourceDispatcherHost* resource_dispatcher_host_;
 
   // The data directory that Chrome plugins should use to store persistent data.
   FilePath chrome_plugin_data_dir_;
 
   // The browser's UI locale.
   const std::wstring ui_locale_;
 
   // Need synchronization whenever we access the plugin_list singelton through
   // webkit_glue since this class is called on the main and IO thread.
   Lock lock_;
 
+#if defined(OS_WIN)
+  // Registry keys for getting notifications when new plugins are installed.
+  RegKey hkcu_key_;
+  RegKey hklm_key_;
+  scoped_ptr<base::WaitableEvent> hkcu_event_;
+  scoped_ptr<base::WaitableEvent> hklm_event_;
+  base::WaitableEventWatcher hkcu_watcher_;
+  base::WaitableEventWatcher hklm_watcher_;
+#endif
+
   DISALLOW_COPY_AND_ASSIGN(PluginService);
 };
 
 #endif  // CHROME_BROWSER_PLUGIN_SERVICE_H_