Fix crash when using the language picker on iOS

ios/chrome/browser/translate/before_translate_infobar_controller.mm

 // Copyright 2013 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 "ios/chrome/browser/translate/before_translate_infobar_controller.h"
 
 #import <UIKit/UIKit.h>
 
 #include "base/logging.h"
 #include "base/strings/sys_string_conversions.h"
@@ skipping 198 matching lines @@
   [_languagePicker setDataSource:nil];
   [_languagePicker setDelegate:nil];
   _languagePickerController.reset();
   // Animate the picker away.
   CGRect languagePickerFrame = [_languagePicker frame];
   CGRect navigationBarFrame = [_navigationBar frame];
   const CGFloat animationHeight =
       languagePickerFrame.size.height + navigationBarFrame.size.height;
   languagePickerFrame.origin.y += animationHeight;
   navigationBarFrame.origin.y += animationHeight;
-  base::scoped_nsobject<UIView> blockLanguagePicker(_languagePicker);
-  base::scoped_nsobject<UIView> blockNavigationBar(_navigationBar);
+  auto blockLanguagePicker(_languagePicker);
+  auto blockNavigationBar(_navigationBar);
   _languagePicker.reset();
   _navigationBar.reset();
   void (^animations)(void) = ^{
     blockLanguagePicker.get().frame = languagePickerFrame;
     blockNavigationBar.get().frame = navigationBarFrame;
   };
-  base::scoped_nsobject<UIView> blockSelectionView(_languageSelectionView);
+  auto blockSelectionView(_languageSelectionView);
   _languageSelectionView.reset();
   void (^completion)(BOOL finished) = ^(BOOL finished) {
     [blockSelectionView removeFromSuperview];
   };
   [UIView animateWithDuration:kPickerAnimationDurationInSeconds
                    animations:animations
                    completion:completion];
 }
 
 #pragma mark - Handling of User Events
@@ skipping 91 matching lines @@
   _languagePicker.reset(
       [[UIPickerView alloc] initWithFrame:initialPickerFrame]);
   [_languagePicker setAutoresizingMask:resizingMask];
   [_languagePicker setShowsSelectionIndicator:YES];
   [_languagePicker setDataSource:_languagePickerController];
   [_languagePicker setDelegate:_languagePickerController];
   [_languagePicker setShowsSelectionIndicator:YES];
   [_languagePicker setBackgroundColor:[infoBarView_ backgroundColor]];
   [_languagePicker selectRow:selectedRow inComponent:0 animated:NO];
 
-  base::scoped_nsobject<UIView> blockLanguagePicker(_languagePicker);
-  base::scoped_nsobject<UIView> blockNavigationBar(_navigationBar);
+  auto blockLanguagePicker(_languagePicker);
+  auto blockNavigationBar(_navigationBar);
   [UIView animateWithDuration:kPickerAnimationDurationInSeconds
                    animations:^{
                      blockLanguagePicker.get().frame = finalPickerFrame;
                      blockNavigationBar.get().frame = finalNavigationBarFrame;
                    }];
 
   // Add the subviews.
   [_languageSelectionView addSubview:_languagePicker];
   [_languageSelectionView addSubview:_navigationBar];
 }
 
 - (void)removeView {
   [super removeView];
   [self dismissLanguageSelectionView];
 }
 
 - (void)detachView {
   [super detachView];
   [self dismissLanguageSelectionView];
 }
 
 @end