Remove legacy InfoBarViewProtocol.

ios/chrome/browser/translate/never_translate_infobar_controller.mm

Index: ios/chrome/browser/translate/never_translate_infobar_controller.mm
diff --git a/ios/chrome/browser/translate/never_translate_infobar_controller.mm b/ios/chrome/browser/translate/never_translate_infobar_controller.mm
index d9b222480273f52d6c70775604f0b1e2a50c4fce..408da6501acc33e088145de86e1593a14e6e8b1a 100644
--- a/ios/chrome/browser/translate/never_translate_infobar_controller.mm
+++ b/ios/chrome/browser/translate/never_translate_infobar_controller.mm
@@ -12,7 +12,6 @@
 #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 "ios/chrome/grit/ios_chromium_strings.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/gfx/image/image.h"
@@ -29,10 +28,9 @@
 #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;
   translate::TranslateInfoBarDelegate* translateInfoBarDelegate =
       delegate->AsTranslateInfoBarDelegate();
   infoBarView.reset(