Remove the distinction between informational and warning infobar

ios/chrome/browser/translate/translate_message_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/translate_message_infobar_controller.h"
 
 #include "base/strings/sys_string_conversions.h"
 #include "components/translate/core/browser/translate_infobar_delegate.h"
 #include "ios/chrome/browser/translate/translate_infobar_tags.h"
 #include "ios/public/provider/chrome/browser/chrome_browser_provider.h"
@@ skipping 10 matching lines @@
 
 @implementation TranslateMessageInfoBarController
 
 #pragma mark -
 #pragma mark InfoBarControllerProtocol
 
 - (void)layoutForDelegate:(infobars::InfoBarDelegate*)delegate
                     frame:(CGRect)frame {
   translate::TranslateInfoBarDelegate* 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()];
   // Text.
   [infoBarView_
       addLabel:base::SysUTF16ToNSString(
                    translateInfoBarDelegate->GetMessageInfoBarText())];
   // Close button.
   [infoBarView_ addCloseButtonWithTag:TranslateInfoBarIOSTag::CLOSE
@@ skipping 24 matching lines @@
     if (buttonId == TranslateInfoBarIOSTag::CLOSE) {
       delegate_->InfoBarDidCancel();
     } else {
       DCHECK(buttonId == TranslateInfoBarIOSTag::MESSAGE);
       delegate_->InfoBarButtonDidPress(buttonId);
     }
   }
 }
 
 @end