Remove InfoBarDelegate::InfoBarClosed(), delete InfoBars directly.

chrome/browser/download/download_request_infobar_delegate_unittest.cc

Index: chrome/browser/download/download_request_infobar_delegate_unittest.cc
diff --git a/chrome/browser/download/download_request_infobar_delegate_unittest.cc b/chrome/browser/download/download_request_infobar_delegate_unittest.cc
index fdaab1add50e172f286d69a3017fe54e5c959827..219ed09e74ccf1658085417794943c9272202701 100644
--- a/chrome/browser/download/download_request_infobar_delegate_unittest.cc
+++ b/chrome/browser/download/download_request_infobar_delegate_unittest.cc
@@ -22,12 +22,7 @@ class MockTabDownloadState : public DownloadRequestLimiter::TabDownloadState {
     return infobar_->AsConfirmInfoBarDelegate();
   }
   void close_infobar() {
-    // TODO(pkasting): Right now InfoBarDelegates delete themselves via
-    // InfoBarClosed(); once InfoBars own their delegates, this can become a
-    // simple reset() call and ~MockTabDownloadState() will no longer need to
-    // call it.
-    if (infobar_ != NULL)
-      infobar_.release()->InfoBarClosed();
+    infobar_.reset(NULL);
   }
   bool responded() const { return responded_; }
   bool accepted() const { return accepted_; }