Cleanup: remove redundant tab close observation from TabModalConfirmDialogDelegate

chrome/browser/ui/tab_modal_confirm_dialog_browsertest.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/ui/tab_modal_confirm_dialog_browsertest.h"
 
 #include "base/bind.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/lifetime/application_lifetime.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_dialogs.h"
 #include "chrome/browser/ui/tabs/tab_strip_model.h"
 #include "chrome/test/base/ui_test_utils.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 MockTabModalConfirmDialogDelegate::MockTabModalConfirmDialogDelegate(
-    content::WebContents* web_contents,
     Delegate* delegate)
-    : TabModalConfirmDialogDelegate(web_contents),
-      delegate_(delegate) {
+    : delegate_(delegate) {
 }
 
 MockTabModalConfirmDialogDelegate::~MockTabModalConfirmDialogDelegate() {
 }
 
 string16 MockTabModalConfirmDialogDelegate::GetTitle() {
   return string16();
 }
 
 string16 MockTabModalConfirmDialogDelegate::GetMessage() {
@@ skipping 11 matching lines @@
 }
 
 TabModalConfirmDialogTest::TabModalConfirmDialogTest()
     : delegate_(NULL),
       dialog_(NULL),
       accepted_count_(0),
       canceled_count_(0) {
 }
 
 void TabModalConfirmDialogTest::SetUpOnMainThread() {
-  delegate_ = new MockTabModalConfirmDialogDelegate(
-      browser()->tab_strip_model()->GetActiveWebContents(), this);
+  delegate_ = new MockTabModalConfirmDialogDelegate(this);
   dialog_ = TabModalConfirmDialog::Create(
       delegate_, browser()->tab_strip_model()->GetActiveWebContents());
   content::RunAllPendingInMessageLoop();
 }
 
 void TabModalConfirmDialogTest::CleanUpOnMainThread() {
   content::RunAllPendingInMessageLoop();
 }
 
 void TabModalConfirmDialogTest::OnAccepted() {
@@ skipping 22 matching lines @@
   EXPECT_EQ(1, canceled_count_);
 }
 
 IN_PROC_BROWSER_TEST_F(TabModalConfirmDialogTest, Quit) {
   base::MessageLoopForUI::current()->PostTask(FROM_HERE,
                                               base::Bind(&chrome::AttemptExit));
   content::RunMessageLoop();
   EXPECT_EQ(0, accepted_count_);
   EXPECT_EQ(1, canceled_count_);
 }