Cleanup: remove redundant tab close observation from TabModalConfirmDialogDelegate

chrome/browser/download/download_danger_prompt.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/download/download_danger_prompt.h"
 
 #include "base/bind.h"
 #include "chrome/browser/download/chrome_download_manager_delegate.h"
 #include "chrome/browser/ui/tab_modal_confirm_dialog.h"
 #include "chrome/browser/ui/tab_modal_confirm_dialog_delegate.h"
 #include "content/public/browser/download_danger_type.h"
 #include "content/public/browser/download_item.h"
 #include "grit/generated_resources.h"
 #include "ui/base/l10n/l10n_util.h"
 
 namespace {
 
 // Implements DownloadDangerPrompt using a TabModalConfirmDialog.
 class DownloadDangerPromptImpl
   : public DownloadDangerPrompt,
     public content::DownloadItem::Observer,
     public TabModalConfirmDialogDelegate {
  public:
   DownloadDangerPromptImpl(content::DownloadItem* item,
-                           content::WebContents* web_contents,
                            bool show_context,
                            const base::Closure& accepted,
                            const base::Closure& canceled);
   virtual ~DownloadDangerPromptImpl();
 
   // DownloadDangerPrompt
   virtual void InvokeActionForTesting(Action action) OVERRIDE;
 
  private:
   // content::DownloadItem::Observer
@@ skipping 20 matching lines @@
   content::DownloadItem* download_;
   bool show_context_;
   base::Closure accepted_;
   base::Closure canceled_;
 
   DISALLOW_COPY_AND_ASSIGN(DownloadDangerPromptImpl);
 };
 
 DownloadDangerPromptImpl::DownloadDangerPromptImpl(
     content::DownloadItem* download,
-    content::WebContents* web_contents,
     bool show_context,
     const base::Closure& accepted,
     const base::Closure& canceled)
-    : TabModalConfirmDialogDelegate(web_contents),
-      download_(download),
+    : download_(download),
       show_context_(show_context),
       accepted_(accepted),
       canceled_(canceled) {
   DCHECK(!accepted_.is_null());
   // canceled_ is allowed to be null.
   DCHECK(download_);
   download_->AddObserver(this);
 }
 
 DownloadDangerPromptImpl::~DownloadDangerPromptImpl() {
@@ skipping 86 matching lines @@
 }  // namespace
 
 // static
 DownloadDangerPrompt* DownloadDangerPrompt::Create(
     content::DownloadItem* item,
     content::WebContents* web_contents,
     bool show_context,
     const base::Closure& accepted,
     const base::Closure& canceled) {
   DownloadDangerPromptImpl* prompt = new DownloadDangerPromptImpl(
-      item, web_contents, show_context, accepted, canceled);
+      item, show_context, accepted, canceled);
   // |prompt| will be deleted when the dialog is done.
   TabModalConfirmDialog::Create(prompt, web_contents);
   return prompt;
 }