Infobar system refactor.

chrome/browser/download/download_request_infobar_delegate.h

 // Copyright (c) 2011 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_DOWNLOAD_DOWNLOAD_REQUEST_INFOBAR_DELEGATE_H_
 #define CHROME_BROWSER_DOWNLOAD_DOWNLOAD_REQUEST_INFOBAR_DELEGATE_H_
 
 #include "base/basictypes.h"
 #include "base/memory/weak_ptr.h"
 #include "chrome/browser/download/download_request_limiter.h"
@@ skipping 16 matching lines @@
 
   // Creates a download request delegate and adds it to |infobar_service|.
   static void Create(
       InfoBarService* infobar_service,
       base::WeakPtr<DownloadRequestLimiter::TabDownloadState> host);
 
 #if defined(UNIT_TEST)
   static scoped_ptr<DownloadRequestInfoBarDelegate> Create(
       base::WeakPtr<DownloadRequestLimiter::TabDownloadState> host) {
     return scoped_ptr<DownloadRequestInfoBarDelegate>(
-        new DownloadRequestInfoBarDelegate(NULL, host));
+        new DownloadRequestInfoBarDelegate(host));
   }
 #endif
 
   static void SetCallbackForTesting(FakeCreateCallback* callback);
 
  private:
   static FakeCreateCallback* callback_;
 
-  DownloadRequestInfoBarDelegate(
-      InfoBarService* infobar_service,
+  explicit DownloadRequestInfoBarDelegate(
       base::WeakPtr<DownloadRequestLimiter::TabDownloadState> host);
 
   // ConfirmInfoBarDelegate:
   virtual int GetIconID() const OVERRIDE;
   virtual string16 GetMessageText() const OVERRIDE;
   virtual string16 GetButtonLabel(InfoBarButton button) const OVERRIDE;
   virtual bool Accept() OVERRIDE;
   virtual bool Cancel() OVERRIDE;
 
   bool responded_;
   base::WeakPtr<DownloadRequestLimiter::TabDownloadState> host_;
 
   DISALLOW_COPY_AND_ASSIGN(DownloadRequestInfoBarDelegate);
 };
 
 #endif  // CHROME_BROWSER_DOWNLOAD_DOWNLOAD_REQUEST_INFOBAR_DELEGATE_H_