Rewrite scoped_ptr<T>(NULL) to use the default ctor in chrome/.

chrome/browser/ui/views/bookmarks/bookmark_bar_view_test.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 "base/bind.h"
 #include "base/callback.h"
 #include "base/compiler_specific.h"
 #include "base/prefs/pref_service.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/utf_string_conversions.h"
@@ skipping 96 matching lines @@
 // * if CreateBigMenu returns return true, 100 menu items are created here with
 //   the names f1-f100.
 //
 // Subclasses should be sure and invoke super's implementation of SetUp and
 // TearDown.
 class BookmarkBarViewEventTestBase : public ViewEventTestBase {
  public:
   BookmarkBarViewEventTestBase()
       : ViewEventTestBase(),
         model_(NULL),
-        bb_view_(NULL),
         file_thread_(BrowserThread::FILE, base::MessageLoop::current()) {}
 
   virtual void SetUp() OVERRIDE {
     views::MenuController::TurnOffContextMenuSelectionHoldForTest();
     BookmarkBarView::DisableAnimationsForTesting(true);
 
     profile_.reset(new TestingProfile());
     profile_->CreateBookmarkModel(true);
     model_ = BookmarkModelFactory::GetForProfile(profile_.get());
     ui_test_utils::WaitForBookmarkModelToLoad(model_);
@@ skipping 1649 matching lines @@
     EXPECT_TRUE(bb_view_->GetContextMenu() == NULL);
     EXPECT_TRUE(bb_view_->GetMenu() == NULL);
 
     Done();
   }
 
   ContextMenuNotificationObserver observer_;
 };
 
 VIEW_TEST(BookmarkBarViewTest21, ContextMenusForEmptyFolder)