Cleanup ios/web_view.

ios/web_view/internal/criwv_web_view_impl.h

Index: ios/web_view/internal/criwv_web_view_impl.h
diff --git a/ios/web_view/internal/criwv_web_view_impl.h b/ios/web_view/internal/criwv_web_view_impl.h
index f34d8aa949f369e1599c7d57646dbaf77a22e535..fbd9170e9ab082c8b473e93215212f296da232d6 100644
--- a/ios/web_view/internal/criwv_web_view_impl.h
+++ b/ios/web_view/internal/criwv_web_view_impl.h
@@ -1,6 +1,7 @@
 // Copyright 2014 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.
+
 #ifndef IOS_WEB_VIEW_INTERNAL_CRIWV_WEB_VIEW_IMPL_H_
 #define IOS_WEB_VIEW_INTERNAL_CRIWV_WEB_VIEW_IMPL_H_
 
@@ -12,9 +13,10 @@ class CRIWVBrowserState;
 
 @interface CRIWVWebViewImpl : NSObject<CRIWVWebView>
 
-// Designated initializer.
+- (instancetype)init NS_UNAVAILABLE;
+
 - (instancetype)initWithBrowserState:
-    (ios_web_view::CRIWVBrowserState*)browserState;
+    (ios_web_view::CRIWVBrowserState*)browserState NS_DESIGNATED_INITIALIZER;
 
 @end