Switch HungPluginTabHelper to use WebContentsUserData.

chrome/browser/ui/hung_plugin_tab_helper.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 CHROME_BROWSER_UI_HUNG_PLUGIN_TAB_HELPER_H_
 #define CHROME_BROWSER_UI_HUNG_PLUGIN_TAB_HELPER_H_
 
 #include <map>
 
 #include "base/file_path.h"
 #include "base/memory/linked_ptr.h"
 #include "base/string16.h"
 #include "base/time.h"
 #include "base/timer.h"
+#include "chrome/browser/tab_contents/web_contents_user_data.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 #include "content/public/browser/web_contents_observer.h"
 
 class FilePath;
 class InfoBarTabHelper;
 
 // Manages per-tab state with regard to hung plugins. This only handles
 // Pepper plugins which we know are windowless. Hung NPAPI plugins (which
 // may have native windows) can not be handled with infobars and have a
 // separate OS-specific hang monitoring.
 //
 // Our job is:
 // - Pop up an infobar when a plugin is hung.
 // - Terminate the plugin process if the user so chooses.
 // - Periodically re-show the hung plugin infobar if the user closes it without
 //   terminating the plugin.
 // - Hide the infobar if the plugin starts responding again.
 // - Keep track of all of this for any number of plugins.
 class HungPluginTabHelper : public content::WebContentsObserver,
-                            public content::NotificationObserver {
+                            public content::NotificationObserver,
+                            public WebContentsUserData<HungPluginTabHelper> {
  public:
-  explicit HungPluginTabHelper(content::WebContents* contents);
   virtual ~HungPluginTabHelper();
 
   // content::WebContentsObserver overrides:
   virtual void PluginCrashed(const FilePath& plugin_path) OVERRIDE;
   virtual void PluginHungStatusChanged(int plugin_child_id,
                                        const FilePath& plugin_path,
                                        bool is_hung) OVERRIDE;
 
   // NotificationObserver overrides.
   virtual void Observe(int type,
                        const content::NotificationSource& source,
                        const content::NotificationDetails& details) OVERRIDE;
 
  private:
+  explicit HungPluginTabHelper(content::WebContents* contents);
+  static int kUserDataKey;
+  friend class WebContentsUserData<HungPluginTabHelper>;
+
   class InfoBarDelegate;
   friend class InfoBarDelegate;
 
   // Per-plugin state (since there could be more than one plugin hung). The
   // integer key is the child process ID of the plugin process. This maintains
   // the state for all plugins on this page that are currently hung, whether or
   // not we're currently showing the infobar.
   struct PluginState {
     // Initializes the plugin state to be a hung plugin.
     PluginState(const FilePath& p, const string16& n);
@@ skipping 38 matching lines @@
 
   content::NotificationRegistrar registrar_;
 
   // All currently hung plugins.
   PluginStateMap hung_plugins_;
 
   DISALLOW_COPY_AND_ASSIGN(HungPluginTabHelper);
 };
 
 #endif  // CHROME_BROWSER_UI_HUNG_PLUGIN_TAB_HELPER_H_