Move infobar handling to a tab helper.

chrome/browser/plugin_observer.cc

Index: chrome/browser/plugin_observer.cc
diff --git a/chrome/browser/plugin_observer.cc b/chrome/browser/plugin_observer.cc
index 4555ff88220f6f1e5309e923d73ec3483cdb2bc1..644a4f494db45177a2e37b98974103f94a4d575a 100644
--- a/chrome/browser/plugin_observer.cc
+++ b/chrome/browser/plugin_observer.cc
@@ -7,6 +7,7 @@
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/content_settings/host_content_settings_map.h"
 #include "chrome/browser/google/google_util.h"
+#include "chrome/browser/infobars/infobar_tab_helper.h"
 #include "chrome/browser/plugin_installer_infobar_delegate.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/tab_contents/confirm_infobar_delegate.h"
@@ -313,18 +314,19 @@ PluginInstallerInfoBarDelegate* PluginObserver::GetPluginInstaller() {
 void PluginObserver::OnMissingPluginStatus(int status) {
   // TODO(PORT): pull in when plug-ins work
 #if defined(OS_WIN)
+  InfoBarTabHelper* infobar_helper = tab_contents_->infobar_tab_helper();
   if (status == webkit::npapi::default_plugin::MISSING_PLUGIN_AVAILABLE) {
-    tab_contents_->AddInfoBar(
+    infobar_helper->AddInfoBar(
         new PluginInstallerInfoBarDelegate(tab_contents()));
     return;
   }
 
   DCHECK_EQ(webkit::npapi::default_plugin::MISSING_PLUGIN_USER_STARTED_DOWNLOAD,
             status);
-  for (size_t i = 0; i < tab_contents_->infobar_count(); ++i) {
-    InfoBarDelegate* delegate = tab_contents_->GetInfoBarDelegateAt(i);
+  for (size_t i = 0; i < infobar_helper->infobar_count(); ++i) {
+    InfoBarDelegate* delegate = infobar_helper->GetInfoBarDelegateAt(i);
     if (delegate->AsPluginInstallerInfoBarDelegate() != NULL) {
-      tab_contents_->RemoveInfoBar(delegate);
+      infobar_helper->RemoveInfoBar(delegate);
       return;
     }
   }
@@ -350,15 +352,17 @@ void PluginObserver::OnCrashedPlugin(const FilePath& plugin_path) {
   }
   gfx::Image* icon = &ResourceBundle::GetSharedInstance().GetNativeImageNamed(
       IDR_INFOBAR_PLUGIN_CRASHED);
-  tab_contents_->AddInfoBar(new SimpleAlertInfoBarDelegate(tab_contents(),
-      icon,
-      l10n_util::GetStringFUTF16(IDS_PLUGIN_CRASHED_PROMPT, plugin_name),
-      true));
+  tab_contents_->infobar_tab_helper()->AddInfoBar(
+      new SimpleAlertInfoBarDelegate(
+          tab_contents(),
+          icon,
+          l10n_util::GetStringFUTF16(IDS_PLUGIN_CRASHED_PROMPT, plugin_name),
+          true));
 }
 
 void PluginObserver::OnBlockedOutdatedPlugin(const string16& name,
                                              const GURL& update_url) {
-  tab_contents_->AddInfoBar(update_url.is_empty() ?
+  tab_contents_->infobar_tab_helper()->AddInfoBar(update_url.is_empty() ?
       static_cast<InfoBarDelegate*>(new BlockedPluginInfoBarDelegate(
           tab_contents(), name)) :
       new OutdatedPluginInfoBarDelegate(tab_contents(), name, update_url));