Move infobar handling to a tab helper.

chrome/browser/pdf_unsupported_feature.cc

Index: chrome/browser/pdf_unsupported_feature.cc
diff --git a/chrome/browser/pdf_unsupported_feature.cc b/chrome/browser/pdf_unsupported_feature.cc
index 860ceec1c40efbfa085ba36695ddc4c7e832b5aa..a599401c0d044194d059ab2d2cc045199f9b1abe 100644
--- a/chrome/browser/pdf_unsupported_feature.cc
+++ b/chrome/browser/pdf_unsupported_feature.cc
@@ -7,6 +7,7 @@
 #include "base/utf_string_conversions.h"
 #include "base/values.h"
 #include "base/version.h"
+#include "chrome/browser/infobars/infobar_tab_helper.h"
 #include "chrome/browser/plugin_prefs.h"
 #include "chrome/browser/prefs/pref_service.h"
 #include "chrome/browser/profiles/profile.h"
@@ -155,9 +156,9 @@ void OpenUsingReader(TabContentsWrapper* tab,
 
   if (new_delegate) {
     if (old_delegate) {
-      tab->ReplaceInfoBar(old_delegate, new_delegate);
+      tab->infobar_tab_helper()->ReplaceInfoBar(old_delegate, new_delegate);
     } else {
-      tab->AddInfoBar(new_delegate);
+      tab->infobar_tab_helper()->AddInfoBar(new_delegate);
     }
   }
 }
@@ -386,5 +387,6 @@ void PDFHasUnsupportedFeature(TabContentsWrapper* tab) {
     }
   }
 
-  tab->AddInfoBar(new PDFUnsupportedFeatureInfoBarDelegate(tab, reader_group));
+  tab->infobar_tab_helper()->AddInfoBar(
+      new PDFUnsupportedFeatureInfoBarDelegate(tab, reader_group));
 }