Remove legacy InfoBarViewProtocol.

ios/chrome/browser/translate/after_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/after_translate_infobar_controller.h"
 
 #include "base/mac/scoped_nsobject.h"
 #include "base/strings/sys_string_conversions.h"
 #include "base/strings/utf_string_conversions.h"
 #include "components/strings/grit/components_strings.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/base/l10n/l10n_util.h"
 #include "ui/gfx/image/image.h"
 
 @interface AfterTranslateInfoBarController () {
   translate::TranslateInfoBarDelegate* _translateInfoBarDelegate;  // weak
 }
 
 // Action for any of the user defined buttons.
 - (void)infoBarButtonDidPress:(id)sender;
 
 @end
 
 @implementation AfterTranslateInfoBarController
 
 #pragma mark -
 #pragma mark InfoBarControllerProtocol
 
-- (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;
   _translateInfoBarDelegate = delegate->AsTranslateInfoBarDelegate();
   DCHECK(_translateInfoBarDelegate);
   infoBarView.reset(
       [[InfoBarView alloc] initWithFrame:frame delegate:self.delegate]);
   // Icon
   gfx::Image icon = _translateInfoBarDelegate->GetIcon();
   if (!icon.IsEmpty())
     [infoBarView addLeftIcon:icon.ToUIImage()];
   // Main text.
   const bool autodeterminedSourceLanguage =
@@ skipping 68 matching lines @@
 }
 
 - (void)infoBarSwitchDidPress:(id)sender {
   DCHECK_EQ(TranslateInfoBarIOSTag::ALWAYS_TRANSLATE_SWITCH, [sender tag]);
   DCHECK([sender respondsToSelector:@selector(isOn)]);
   if (_translateInfoBarDelegate->ShouldAlwaysTranslate() != [sender isOn])
     _translateInfoBarDelegate->ToggleAlwaysTranslate();
 }
 
 @end