Remove dependency of plugin infobar delegates on PluginObserver.

chrome/browser/plugins/plugin_observer.cc

 // 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.
 
 #include "chrome/browser/plugins/plugin_observer.h"
 
 #include "base/auto_reset.h"
 #include "base/bind.h"
 #include "base/stl_util.h"
 #include "base/utf_string_conversions.h"
@@ skipping 237 matching lines @@
                                         PluginFinder* plugin_finder) {
   PluginInstaller* installer =
       plugin_finder->FindPluginWithIdentifier(identifier);
   DCHECK(installer) << "Couldn't find PluginInstaller for identifier "
                     << identifier;
   plugin_placeholders_[placeholder_id] =
       new PluginPlaceholderHost(this, placeholder_id, installer);
   TabContents* tab_contents = TabContents::FromWebContents(web_contents());
   InfoBarTabHelper* infobar_helper = tab_contents->infobar_tab_helper();
   infobar_helper->AddInfoBar(
-      OutdatedPluginInfoBarDelegate::Create(this, installer));
+      OutdatedPluginInfoBarDelegate::Create(web_contents(), installer));
 }
 
 void PluginObserver::OnFindMissingPlugin(int placeholder_id,
                                          const std::string& mime_type) {
 PluginFinder::Get(base::Bind(&PluginObserver::FindMissingPlugin,
                              weak_ptr_factory_.GetWeakPtr(),
                              placeholder_id, mime_type));
 }
 
 void PluginObserver::FindMissingPlugin(int placeholder_id,
@@ skipping 66 matching lines @@
   InfoBarTabHelper* infobar_helper = tab_contents->infobar_tab_helper();
   infobar_helper->AddInfoBar(new SimpleAlertInfoBarDelegate(
       infobar_helper,
       &ResourceBundle::GetSharedInstance().GetNativeImageNamed(
           IDR_INFOBAR_PLUGIN_CRASHED),
       l10n_util::GetStringFUTF16(IDS_PLUGIN_INITIALIZATION_ERROR_PROMPT,
                                  plugin_name),
       true  /* auto_expire */));
 }