Remove legacy InfoBarViewProtocol.

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/mac/scoped_nsobject.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"
 #import "ios/chrome/browser/ui/infobars/infobar_view.h"
 #import "ios/chrome/browser/ui/infobars/infobar_view_delegate.h"
-#import "ios/chrome/browser/ui/infobars/infobar_view_protocol.h"
 #include "ui/gfx/image/image.h"
 
 @interface TranslateMessageInfoBarController ()
 
 // Action for any of the user defined buttons.
 - (void)infoBarButtonDidPress:(id)sender;
 
 @end
 
 @implementation TranslateMessageInfoBarController
 
-- (UIView<InfoBarViewProtocol>*)viewForDelegate:
-                                    (infobars::InfoBarDelegate*)delegate
-                                          frame:(CGRect)frame {
-  base::scoped_nsobject<UIView<InfoBarViewProtocol>> infoBarView;
+- (InfoBarView*)viewForDelegate:(infobars::InfoBarDelegate*)delegate
+                          frame:(CGRect)frame {
+  base::scoped_nsobject<InfoBarView> infoBarView;
   translate::TranslateInfoBarDelegate* translateInfoBarDelegate =
       delegate->AsTranslateInfoBarDelegate();
   infoBarView.reset(
       [[InfoBarView alloc] initWithFrame:frame delegate:self.delegate]);
   // Icon
   gfx::Image icon = translateInfoBarDelegate->GetIcon();
   if (!icon.IsEmpty())
     [infoBarView addLeftIcon:icon.ToUIImage()];
   // Text.
   [infoBarView addLabel:base::SysUTF16ToNSString(
@@ skipping 28 matching lines @@
     if (buttonId == TranslateInfoBarIOSTag::CLOSE) {
       self.delegate->InfoBarDidCancel();
     } else {
       DCHECK(buttonId == TranslateInfoBarIOSTag::MESSAGE);
       self.delegate->InfoBarButtonDidPress(buttonId);
     }
   }
 }
 
 @end