Remove the distinction between informational and warning infobar

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 109 matching lines @@
   // |_languagePicker| does not retain it.
   base::scoped_nsobject<LanguagePickerController> _languagePickerController;
 }
 
 #pragma mark -
 #pragma mark InfoBarControllerProtocol
 
 - (void)layoutForDelegate:(infobars::InfoBarDelegate*)delegate
                     frame:(CGRect)frame {
   _translateInfoBarDelegate = delegate->AsTranslateInfoBarDelegate();
-  infobars::InfoBarDelegate* infoBarDelegate =
-      static_cast<infobars::InfoBarDelegate*>(_translateInfoBarDelegate);
   DCHECK(!infoBarView_);
   infoBarView_.reset([ios::GetChromeBrowserProvider()->CreateInfoBarView()
       initWithFrame:frame
-           delegate:delegate_
-          isWarning:infoBarDelegate->GetInfoBarType() ==
-                    infobars::InfoBarDelegate::WARNING_TYPE]);
+           delegate:delegate_]);
   // Icon
   gfx::Image icon = _translateInfoBarDelegate->GetIcon();
   if (!icon.IsEmpty())
     [infoBarView_ addLeftIcon:icon.ToUIImage()];
 
   // Main text.
   [self updateInfobarLabel];
 
   // Close button.
   [infoBarView_ addCloseButtonWithTag:TranslateInfoBarIOSTag::BEFORE_DENY
@@ skipping 205 matching lines @@
   [super removeView];
   [self dismissLanguageSelectionView];
 }
 
 - (void)detachView {
   [super detachView];
   [self dismissLanguageSelectionView];
 }
 
 @end